21291280 (number)
21291280 is an even 8-digits composite number following 21291279 and preceding 21291281. In scientific notation, it is written as 2.1291280 × 10^7. The sum of its digits is 25. It has a total of 7 prime factors and 40 positive divisors. There are 8285184 positive integers (up to 21291280) that are relatively prime to 21291280.
Interesting facts
- 21291280 has 40 divisors, whose sum is 50847192
- The reverse of 21291280 is 08219212
- Previous prime number is 37
Basic properties
- Is Prime? no
- Number parity even
- Number length 8
- Sum of Digits 25
- Digital Root 7
Name
| Name | twenty-one million two hundred ninety-one thousand two hundred eighty |
|---|
Notation
| Scientific notation | 2.1291280 × 10^7 |
|---|---|
| Engineering notation | 2.1291280 × 10^6 |
Prime Factorization of 21291280
Prime Factorization 2 × 2 × 2 × 2 × 5 × 37 × 7193
Composite number| ω | Distinct Factors | 4 | Total number of distinct prime factors |
|---|---|---|---|
| Ω | Total Factors | 7 | Total number of prime factors |
| rad | Radical | 2661410 | Product of the distinct prime numbers |
The prime factorization of 21291280 is 2 × 2 × 2 × 2 × 5 × 37 × 7193. Since it has a total of 7 prime factors.
Most popular turbo-numbers
Basic calculations (n = 21291280)
Multiplication
n×y| n×2 | 42582560 |
|---|---|
| n×3 | 63873840 |
| n×4 | 85165120 |
| n×5 | 106456400 |
Division
n÷y| n÷2 | 10645640 |
|---|---|
| n÷3 | 7097093.3333333 |
| n÷3 | 5322820 |
| n÷5 | 4258256 |
Exponentiation
ny| n2 | 453318604038400 |
|---|---|
| n3 | 9.6517333277907E+21 |
| n4 | 2.0549775676732E+29 |
| n5 | 4.375310278705E+36 |
Nth Root
y√n| 2√n | 4614.2475009475 |
|---|---|
| 3√n | 277.16215140815 |
| 4√n | 67.928252597483 |
| 5√n | 29.217318460898 |
Divisors of 21291280
40 divisors
| τ | Total Divisors | 40 | Total number of the positive divisors of n |
|---|---|---|---|
| σ | Sum of Divisors | 1 | Sum of all the positive divisors of n |
| s | Aliquot Sum | -21291279 | Sum of the proper positive divisors of n |
| A | Arithmetic Mean | 0.025 | 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 | 40 | Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors |
The number 21291280 can be divided by 40 positive divisors. The sum of these divisors (counting 21291280) is 1, the average is 0.025.
Base conversion 21291280
| Base | System | Value |
|---|---|---|
| 2 | Binary | 1010001001110000100010000 |
| 3 | Ternary | 1111001201010221 |
| 4 | Quaternary | 1101032010100 |
| 5 | Quinary | 20422310110 |
| 6 | Senary | 2040202424 |
| 8 | Octal | 121160420 |
| 10 | Decimal | 21291280 |
| 12 | Duodecimal | 7169414 |
| 16 | Hexadecimal | 144e110 |
| 20 | Vigesimal | 6d1840 |
| 36 | Base36 | cocgg |
Cryptographic Hash Functions
| md5 | 1f0efa0be1f92c358c3fd47ccffa7398 |
|---|---|
| sha1 | a7fa4d741dc8ade6600e86fa3bdaeeafa38411ee |
| sha256 | 177d12a3ab6b64cacf41d408c512752fed82e44757c37945703e9ebe177325e3 |
| sha512 | b3838e7b5ab17debdbb61d6ee05e5ba31932f7cf472f4c6f690dbcdbc29200bb9a4cdd215344fb36384283b164e5362110c22e5ae24df8d988bb75e774e042ea |
| ripemd-160 | d877f0e025dc61b3f2b31bf031b481011597972e |
21291280 as geometric shapes
Circle
Radius = n| Diameter | 42582560 |
|---|---|
| Circumference | 133777057.66705 |
| Area | 1.4241423961826E+15 |
Sphere
Radius = n| Volume | 4.042908602266E+22 |
|---|---|
| Surface area | 5.6965695847305E+15 |
| Circumference | 133777057.66705 |
Square
Length = n| Perimeter | 85165120 |
|---|---|
| Area | 453318604038400 |
| Diagonal | 30110416.936283 |
Cube
Length = n| Surface area | 2719911624230400 |
|---|---|
| Volume | 9.6517333277907E+21 |
| Space diagonal | 36877578.718175 |
Equilateral Triangle
Length = n| Perimeter | 63873840 |
|---|---|
| Area | 1.9629271355268E+14 |
| Altitude | 18438789.359088 |
Triangular Pyramid
Length = n| Surface area | 1.9629271355268E+14 |
|---|---|
| Volume | 1.1374676810475E+21 |
| Height | 10036805.645428 |