21556721 (number)

21556721 is an odd 8-digits composite number following 21556720 and preceding 21556722. In scientific notation, it is written as 2.1556721 × 10^7. The sum of its digits is 29. It has a total of 2 prime factors and 4 positive divisors. There are 21537792 positive integers (up to 21556721) that are relatively prime to 21556721.

Interesting facts

Basic properties

Name

Name twenty-one million five hundred fifty-six thousand seven hundred twenty-one

Notation

Scientific notation 2.1556721 × 10^7
Engineering notation 2.1556721 × 10^6

Prime Factorization of 21556721

Prime Factorization 1217 × 17713

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 2
Total number of prime factors
rad Radical 21556721
Product of the distinct prime numbers

The prime factorization of 21556721 is 1217 × 17713. Since it has a total of 2 prime factors.

Most popular turbo-numbers

6, 5, 82, 100, 7, 657, 8395, 3713, 95507, 6178, 144857, 663120, 4773722, 499364, 48688452, 85317115, 382021752, 440960246, 7357287477, 9753257533

Basic calculations (n = 21556721)

Multiplication

n×y
n×2 43113442
n×3 64670163
n×4 86226884
n×5 107783605

Division

n÷y
n÷2 10778360.5
n÷3 7185573.6666667
n÷3 5389180.25
n÷5 4311344.2

Exponentiation

ny
n2 464692220271841
n3 1.0017240543271E+22
n4 2.1593885958117E+29
n5 4.6549337490495E+36

Nth Root

y√n
2√n 4642.9216017503
3√n 278.30920257251
4√n 68.138987384245
5√n 29.289809035926

Divisors of 21556721

1, 1217, 17713, 21556721

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 -21556720
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 21556721 can be divided by 4 positive divisors. The sum of these divisors (counting 21556721) is 1, the average is 0.25.

Base conversion 21556721

Base System Value
2 Binary 1010010001110110111110001
3 Ternary 1111120012021002
4 Quaternary 1102032313301
5 Quinary 21004303341
6 Senary 2050011345
8 Octal 122166761
10 Decimal 21556721
12 Duodecimal 7276b55
16 Hexadecimal 148edf1
20 Vigesimal 6eebg1
36 Base36 cu19t

Cryptographic Hash Functions

md5 0947f477cf74d9466555c835c31ea2b2
sha1 a06693c25bed4241d0d3d7b953354a377c741d5c
sha256 fa1eb0537b5fabacd1e66d322b134578a5351516cf64448ce6a9fbe41dae44c6
sha512 392f35096d7da0a735862c4b49eb59caf62c119ef19c4dad669db397c5a5aa3000432a1aee91e9c4306e43e0501af19c2a0cd908733c6cf65024125e4db40c74
ripemd-160 1b8119d3ef03d3e77d58687396f1080a5bdda8f9

21556721 as geometric shapes

Circle

Radius = n
Diameter 43113442
Circumference 135444872.65817
Area 1.4598736653863E+15

Sphere

Radius = n
Volume 4.1960119066641E+22
Surface area 5.8394946615454E+15
Circumference 135444872.65817

Square

Length = n
Perimeter 86226884
Area 464692220271841
Diagonal 30485807.198493

Cube

Length = n
Surface area 2788153321631046
Volume 1.0017240543271E+22
Space diagonal 37337336.016587

Equilateral Triangle

Length = n
Perimeter 64670163
Area 2.012176338482E+14
Altitude 18668668.008293

Triangular Pyramid

Length = n
Surface area 2.012176338482E+14
Volume 1.1805431194872E+21
Height 10161935.732831