21131872 (number)
21131872 is an even 8-digits composite number following 21131871 and preceding 21131873. In scientific notation, it is written as 2.1131872 × 10^7. The sum of its digits is 25. It has a total of 8 prime factors and 36 positive divisors. There are 10337600 positive integers (up to 21131872) that are relatively prime to 21131872.
Interesting facts
- 21131872 has 36 divisors, whose sum is 42519708
- The reverse of 21131872 is 27813112
- Previous prime number is 131
Basic properties
- Is Prime? no
- Number parity even
- Number length 8
- Sum of Digits 25
- Digital Root 7
Name
Name | twenty-one million one hundred thirty-one thousand eight hundred seventy-two |
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Notation
Scientific notation | 2.1131872 × 10^7 |
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Engineering notation | 2.1131872 × 10^6 |
Prime Factorization of 21131872
Prime Factorization 2 × 2 × 2 × 2 × 2 × 71 × 131 × 71
Composite numberω | Distinct Factors | 3 | Total number of distinct prime factors |
---|---|---|---|
Ω | Total Factors | 8 | Total number of prime factors |
rad | Radical | 18602 | Product of the distinct prime numbers |
The prime factorization of 21131872 is 2 × 2 × 2 × 2 × 2 × 71 × 131 × 71. Since it has a total of 8 prime factors.
Most popular turbo-numbers
Basic calculations (n = 21131872)
Multiplication
n×yn×2 | 42263744 |
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n×3 | 63395616 |
n×4 | 84527488 |
n×5 | 105659360 |
Division
n÷yn÷2 | 10565936 |
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n÷3 | 7043957.3333333 |
n÷3 | 5282968 |
n÷5 | 4226374.4 |
Exponentiation
nyn2 | 446556014224384 |
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n3 | 9.4365645334199E+21 |
n4 | 1.9941227383997E+29 |
n5 | 4.2139546460152E+36 |
Nth Root
y√n2√n | 4596.9415919718 |
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3√n | 276.46871277188 |
4√n | 67.800749199192 |
5√n | 29.173436782482 |
Divisors of 21131872
36 divisors
τ | Total Divisors | 36 | Total number of the positive divisors of n |
---|---|---|---|
σ | Sum of Divisors | 1 | Sum of all the positive divisors of n |
s | Aliquot Sum | -21131871 | Sum of the proper positive divisors of n |
A | Arithmetic Mean | 0.027777777777778 | Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n)) |
G | Geometric Mean | 1 | Returns the nth root of the product of n divisors |
H | Harmonic Mean | 36 | Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors |
The number 21131872 can be divided by 36 positive divisors. The sum of these divisors (counting 21131872) is 1, the average is 0.027777777777778.
Base conversion 21131872
Base | System | Value |
---|---|---|
2 | Binary | 1010000100111001001100000 |
3 | Ternary | 1110202121110221 |
4 | Quaternary | 1100213021200 |
5 | Quinary | 20402204442 |
6 | Senary | 2032532424 |
8 | Octal | 120471140 |
10 | Decimal | 21131872 |
12 | Duodecimal | 70b1114 |
16 | Hexadecimal | 1427260 |
20 | Vigesimal | 6c19dc |
36 | Base36 | ckxgg |
Cryptographic Hash Functions
md5 | a2706eb9c9028b979526f678dc2f3736 |
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sha1 | ddfbf9796f36b7230b952b76d747f425186d75e1 |
sha256 | e0261dd84b5aad4110620705310fbf0d5ebe1bdd0b4f9695a290c6a12c02bd30 |
sha512 | 6ce6a9a5b0823d91fead9029fe4850215a55c7e3fb8b218711ed86039b162ccfb8c26959769f3727bbfce62077563dda5d750347e94803559f74a8c6308bef23 |
ripemd-160 | d135b57bfa5c5821ada3e2ce58df4749962b1309 |
21131872 as geometric shapes
Circle
Radius = nDiameter | 42263744 |
---|---|
Circumference | 132775467.6636 |
Area | 1.4028970937037E+15 |
Sphere
Radius = nVolume | 3.9527789084424E+22 |
---|---|
Surface area | 5.6115883748147E+15 |
Circumference | 132775467.6636 |
Square
Length = nPerimeter | 84527488 |
---|---|
Area | 446556014224384 |
Diagonal | 29884979.980732 |
Cube
Length = nSurface area | 2679336085346304 |
---|---|
Volume | 9.4365645334199E+21 |
Space diagonal | 36601475.963042 |
Equilateral Triangle
Length = nPerimeter | 63395616 |
---|---|
Area | 1.9336442626552E+14 |
Altitude | 18300737.981521 |
Triangular Pyramid
Length = nSurface area | 1.9336442626552E+14 |
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Volume | 1.1121097954476E+21 |
Height | 9961659.9935774 |