21557721 (number)

21557721 is an odd 8-digits composite number following 21557720 and preceding 21557722. In scientific notation, it is written as 2.1557721 × 10^7. The sum of its digits is 30. It has a total of 2 prime factors and 4 positive divisors. There are 14371812 positive integers (up to 21557721) that are relatively prime to 21557721.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 2.1557721 × 10^7
Engineering notation 2.1557721 × 10^6

Prime Factorization of 21557721

Prime Factorization 3 × 7185907

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 2
Total number of prime factors
rad Radical 21557721
Product of the distinct prime numbers

The prime factorization of 21557721 is 3 × 7185907. Since it has a total of 2 prime factors.

Most popular turbo-numbers

6, 8, 31, 44, 866, 449, 4972, 9732, 6773, 9662, 972730, 787832, 9375341, 7084581, 3946612, 97549132, 654052721, 465206864, 7955721814, 4048273749

Basic calculations (n = 21557721)

Multiplication

n×y
n×2 43115442
n×3 64673163
n×4 86230884
n×5 107788605

Division

n÷y
n÷2 10778860.5
n÷3 7185907
n÷3 5389430.25
n÷5 4311544.2

Exponentiation

ny
n2 464735334713841
n3 1.0018634684603E+22
n4 2.1597893133159E+29
n5 4.6560135435245E+36

Nth Root

y√n
2√n 4643.029291314
3√n 278.31350602384
4√n 68.139777599534
5√n 29.290080777306

Divisors of 21557721

1, 3, 7185907, 21557721

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 -21557720
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 21557721 can be divided by 4 positive divisors. The sum of these divisors (counting 21557721) is 1, the average is 0.25.

Base conversion 21557721

Base System Value
2 Binary 1010010001111000111011001
3 Ternary 1111120020122010
4 Quaternary 1102033013121
5 Quinary 21004321341
6 Senary 2050020133
8 Octal 122170731
10 Decimal 21557721
12 Duodecimal 7277649
16 Hexadecimal 148f1d9
20 Vigesimal 6eee61
36 Base36 cu21l

Cryptographic Hash Functions

md5 8931b4caf2994d58f0e053f653e335dd
sha1 0f1762d5502160fcc39f0f8a957f17b4f615cecc
sha256 d3c8e84cb4faa2e18689f81a21dbf884054f597c6d65a26eac414287aa11485e
sha512 4a82373b3f21df168e24d588ef5f5fc351cba4c211aa8f7520dc2393a781eb485d641485b52552cbc02e67c30979ce71765f1d2f966fc74cebc87e6f511650ea
ripemd-160 1e5f17be2e5584598da5c6aa8548f00c94f94ce5

21557721 as geometric shapes

Circle

Radius = n
Diameter 43115442
Circumference 135451155.84348
Area 1.4600091134006E+15

Sphere

Radius = n
Volume 4.1965958832197E+22
Surface area 5.8400364536024E+15
Circumference 135451155.84348

Square

Length = n
Perimeter 86230884
Area 464735334713841
Diagonal 30487221.412055

Cube

Length = n
Surface area 2788412008283046
Volume 1.0018634684603E+22
Space diagonal 37339068.067395

Equilateral Triangle

Length = n
Perimeter 64673163
Area 2.0123630294923E+14
Altitude 18669534.033697

Triangular Pyramid

Length = n
Surface area 2.0123630294923E+14
Volume 1.1807074206189E+21
Height 10162407.137352