21100 (number)
21,100 (twentyone thousand one hundred) is an even fivedigits composite number following 21099 and preceding 21101. In scientific notation, it is written as 2.11 × 10^{4}. The sum of its digits is 4. It has a total of 5 prime factors and 18 positive divisors. There are 8,400 positive integers (up to 21100) that are relatively prime to 21100.
Basic properties
 Is Prime? No
 Number parity Even
 Number length 5
 Sum of Digits 4
 Digital Root 4
Name
Short name  21 thousand 100 

Full name  twentyone thousand one hundred 
Notation
Scientific notation  2.11 × 10^{4} 

Engineering notation  21.1 × 10^{3} 
Prime Factorization of 21100
Prime Factorization 2^{2} × 5^{2} × 211
Composite numberω(n)  Distinct Factors  3  Total number of distinct prime factors 

Ω(n)  Total Factors  5  Total number of prime factors 
rad(n)  Radical  2110  Product of the distinct prime numbers 
λ(n)  Liouville Lambda  1  Returns the parity of Ω(n), such that λ(n) = (1)^{Ω(n)} 
μ(n)  Mobius Mu  0  Returns:

Λ(n)  Mangoldt function  0  Returns log(p) if n is a power p^{k} of any prime p (for any k >= 1), else returns 0 
The prime factorization of 21,100 is 2^{2} × 5^{2} × 211. Since it has a total of 5 prime factors, 21,100 is a composite number.
Divisors of 21100
18 divisors
τ(n)  Total Divisors  18  Total number of the positive divisors of n 

σ(n)  Sum of Divisors  46004  Sum of all the positive divisors of n 
s(n)  Aliquot Sum  24904  Sum of the proper positive divisors of n 
A(n)  Arithmetic Mean  2555.777  Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n)) 
G(n)  Geometric Mean  145.25839046334  Returns the nth root of the product of n divisors 
H(n)  Harmonic Mean  8.2558038431466  Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors 
The number 21,100 can be divided by 18 positive divisors (out of which 12 are even, and 6 are odd). The sum of these divisors (counting 21,100) is 46,004, the average is 25,55.,777.
Other Arithmetic Functions (n = 21100)
φ(n)  Euler Totient  8400  Total number of positive integers not greater than n that are coprime to n 

λ(n)  Carmichael Lambda  420  Smallest positive number such that a^{λ(n)} ≡ 1 (mod n) for all a coprime to n 
π(n)  Prime Pi  ≈ 2376  Total number of primes less than or equal to n 
r_{2}(n)  Sum of 2 squares  0  The number of ways n can be represented as the sum of 2 squares 
There are 8,400 positive integers (less than 21,100) that are coprime with 21,100. And there are approximately 2,376 prime numbers less than or equal to 21,100.
Divisibility of 21100
m  2  3  4  5  6  7  8  9 

n mod m  0  1  0  0  4  2  4  4 
The number 21,100 is divisible by 2, 4 and 5.
Classification of 21100
By Arithmetic functions
 Abundant
Expressible via specific sums
 Polite
 Practical
Base conversion (21100)
Base  System  Value 

2  Binary  101001001101100 
3  Ternary  1001221111 
4  Quaternary  11021230 
5  Quinary  1133400 
6  Senary  241404 
8  Octal  51154 
10  Decimal  21100 
12  Duodecimal  10264 
16  Hexadecimal  526c 
20  Vigesimal  2cf0 
36  Base36  ga4 
Basic calculations (n = 21100)
Multiplication
n×yn×2  42200 

n×3  63300 
n×4  84400 
n×5  105500 
Division
n÷yn÷2  10550.000 

n÷3  7033.333 
n÷4  5275.000 
n÷5  4220.000 
Exponentiation
n^{y}n^{2}  445210000 

n^{3}  9393931000000 
n^{4}  198211944100000000 
n^{5}  4182272020510000000000 
Nth Root
^{y}√n^{2}√n  145.25839046334 

^{3}√n  27.632964882546 
^{4}√n  12.052318883241 
^{5}√n  7.3258241747122 
21100 as geometric shapes
Circle
Radius = nDiameter  42200 

Circumference  132575.20998149 
Area  1398668465.3047 
Sphere
Radius = nVolume  39349206157239 

Surface area  5594673861.2188 
Circumference  132575.20998149 
Square
Length = nPerimeter  84400 

Area  445210000 
Diagonal  29839.906166072 
Cube
Length = nSurface area  2671260000 

Volume  9393931000000 
Space diagonal  36546.272039703 
Equilateral Triangle
Length = nPerimeter  63300 

Area  192781585.00943 
Altitude  18273.136019852 
Triangular Pyramid
Length = nSurface area  771126340.03774 

Volume  1107085385349.8 
Height  17228.077857575 
Cryptographic Hash Functions
md5  bdbd38069899d6d54d7c8547f4c6b77c 

sha1  59b93f94217811599a1e72d5a433f0ad5e5faece 
sha256  75bae64a11d6ea6530544e19c2eebfbc944cd3eddf8e0d0873fbfc8373ee0e50 
sha512  7ea1df73f9677b1030fa1b3bf3328e957cbe95d54bd56b37a4e242cf0c5944c039c08fab81bd0e1b1ecdeafe4d89c363a9c26f61ec616715002def18c4e322d6 
ripemd160  61ccca31e70905e95ccb309ffab150a9b5b9b0dd 