21581985 (number)

21581985 is an odd 8-digits composite number following 21581984 and preceding 21581986. In scientific notation, it is written as 2.1581985 × 10^7. The sum of its digits is 39. It has a total of 4 prime factors and 16 positive divisors. There are 11489280 positive integers (up to 21581985) that are relatively prime to 21581985.

Interesting facts

Basic properties

Name

Name twenty-one million five hundred eighty-one thousand nine hundred eighty-five

Notation

Scientific notation 2.1581985 × 10^7
Engineering notation 2.1581985 × 10^6

Prime Factorization of 21581985

Prime Factorization 3 × 5 × 1871 × 769

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 21581985
Product of the distinct prime numbers

The prime factorization of 21581985 is 3 × 5 × 1871 × 769. Since it has a total of 4 prime factors.

Most popular turbo-numbers

10, 2, 4, 44, 550, 139, 4133, 586, 46595, 64576, 895850, 625306, 4254327, 9083875, 20579242, 97751220, 634117741, 894428032, 2354483276, 2221913131

Basic calculations (n = 21581985)

Multiplication

n×y
n×2 43163970
n×3 64745955
n×4 86327940
n×5 107909925

Division

n÷y
n÷2 10790992.5
n÷3 7193995
n÷3 5395496.25
n÷5 4316397

Exponentiation

ny
n2 465782076540225
n3 1.005250178916E+22
n4 2.1695294282612E+29
n5 4.6822751577793E+36

Nth Root

y√n
2√n 4645.6415057557
3√n 278.41788420172
4√n 68.158942962429
5√n 29.29667122136

Divisors of 21581985

1, 3, 5, 15, 769, 1871, 2307, 3845, 5613, 9355, 11535, 28065, 1438799, 4316397, 7193995, 21581985

16 divisors

τ Total Divisors 16
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -21581984
Sum of the proper positive divisors of n
A Arithmetic Mean 0.0625
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 16
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 21581985 can be divided by 16 positive divisors. The sum of these divisors (counting 21581985) is 1, the average is 0.0625.

Base conversion 21581985

Base System Value
2 Binary 1010010010101000010100001
3 Ternary 1111121110220210
4 Quaternary 1102111002201
5 Quinary 21011110420
6 Senary 2050324333
8 Octal 122250241
10 Decimal 21581985
12 Duodecimal 72896a9
16 Hexadecimal 14950a1
20 Vigesimal 6ehej5
36 Base36 cukrl

Cryptographic Hash Functions

md5 7cd2b28b5e7cb5fcf93004ab40bc7e25
sha1 823d18a51d1226de542e9d8d38cb97c50739c52b
sha256 2e34e4611b192b73c0453e1c3a278446aa4f9e99ac0c3820fa90b7b0ea7da5b4
sha512 6b5b87bc88a8f106c6594ebb9e5a0d0878103dfcb33290290daeaafdf65410dd0a9f842616ba7d5ccaf8cbeadbd4f20cee5e831c675ef18633d897dc98ed3173
ripemd-160 ae316762a2285a64598822f0f476cf3f6594c84f

21581985 as geometric shapes

Circle

Radius = n
Diameter 43163970
Circumference 135603611.05177
Area 1.4632975498326E+15

Sphere

Radius = n
Volume 4.2107821028031E+22
Surface area 5.8531901993303E+15
Circumference 135603611.05177

Square

Length = n
Perimeter 86327940
Area 465782076540225
Diagonal 30521535.889933

Cube

Length = n
Surface area 2794692459241350
Volume 1.005250178916E+22
Space diagonal 37381094.548189

Equilateral Triangle

Length = n
Perimeter 64745955
Area 2.0168955545565E+14
Altitude 18690547.274095

Triangular Pyramid

Length = n
Surface area 2.0168955545565E+14
Volume 1.1846986971675E+21
Height 10173845.296644