21131281 (number)

21131281 is an odd 8-digits composite number following 21131280 and preceding 21131282. In scientific notation, it is written as 2.1131281 × 10^7. The sum of its digits is 19. It has a total of 2 prime factors and 4 positive divisors. There are 21118500 positive integers (up to 21131281) that are relatively prime to 21131281.

Interesting facts

Basic properties

Name

Name twenty-one million one hundred thirty-one thousand two hundred eighty-one

Notation

Scientific notation 2.1131281 × 10^7
Engineering notation 2.1131281 × 10^6

Prime Factorization of 21131281

Prime Factorization 1951 × 10831

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 2
Total number of prime factors
rad Radical 21131281
Product of the distinct prime numbers

The prime factorization of 21131281 is 1951 × 10831. Since it has a total of 2 prime factors.

Most popular turbo-numbers

Basic calculations (n = 21131281)

Multiplication

n×y
n×2 42262562
n×3 63393843
n×4 84525124
n×5 105656405

Division

n÷y
n÷2 10565640.5
n÷3 7043760.3333333
n÷3 5282820.25
n÷5 4226256.2

Exponentiation

ny
n2 446531036700961
n3 9.4357728117493E+21
n4 1.9938996673723E+29
n5 4.2133654157052E+36

Nth Root

y√n
2√n 4596.8773096527
3√n 276.46613539283
4√n 67.800275144373
5√n 29.173273600592

Divisors of 21131281

4 divisors

τ Total Divisors 4
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -21131280
Sum of the proper positive divisors of n
A Arithmetic Mean 0.25
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 4
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 21131281 can be divided by 4 positive divisors. The sum of these divisors (counting 21131281) is 1, the average is 0.25.

Base conversion 21131281

Base System Value
2 Binary 1010000100111000000010001
3 Ternary 1110202120200001
4 Quaternary 1100213000101
5 Quinary 20402200111
6 Senary 2032530001
8 Octal 120470021
10 Decimal 21131281
12 Duodecimal 70b0901
16 Hexadecimal 1427011
20 Vigesimal 6c1841
36 Base36 ckx01

Cryptographic Hash Functions

md5 a010074fc1dc0acbd1b3caf6b10ac899
sha1 fb9fb9cf2ad1b6bb3c0cfc495ff6c75eda04d516
sha256 fb7b6724e4c3c39142a5085f7f8149eb80e5a5325f916340b427a225f472f8fe
sha512 5841f34f14ebcd791a59bf0c3c0aac89785b3633fe464e52fda4028205b6df0d56d91009d3728d26887f28731e793d4eb6a3e367c1253c05493b0201c74ac31b
ripemd-160 5cacfa740dc83016f38cc1b3273b7e7703041497

21131281 as geometric shapes

Circle

Radius = n
Diameter 42262562
Circumference 132771754.30108
Area 1.4028186244996E+15

Sphere

Radius = n
Volume 3.9524472728445E+22
Surface area 5.6112744979983E+15
Circumference 132771754.30108

Square

Length = n
Perimeter 84525124
Area 446531036700961
Diagonal 29884144.180517

Cube

Length = n
Surface area 2679186220205766
Volume 9.4357728117493E+21
Space diagonal 36600452.321015

Equilateral Triangle

Length = n
Perimeter 63393843
Area 1.9335361068062E+14
Altitude 18300226.160507

Triangular Pyramid

Length = n
Surface area 1.9335361068062E+14
Volume 1.1120164901539E+21
Height 9961381.3935056