21131981 (number)

21131981 is an odd 8-digits composite number following 21131980 and preceding 21131982. In scientific notation, it is written as 2.1131981 × 10^7. The sum of its digits is 26. It has a total of 3 prime factors and 8 positive divisors. There are 18833472 positive integers (up to 21131981) that are relatively prime to 21131981.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 2.1131981 × 10^7
Engineering notation 2.1131981 × 10^6

Prime Factorization of 21131981

Prime Factorization 29 × 13 × 56053

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 3
Total number of prime factors
rad Radical 21131981
Product of the distinct prime numbers

The prime factorization of 21131981 is 29 × 13 × 56053. Since it has a total of 3 prime factors.

Most popular turbo-numbers

1, 8, 11, 1, 828, 502, 9159, 6960, 7452, 37279, 410550, 624227, 9017235, 5282427, 81542312, 38353030, 76381938, 928936151, 4730911014, 7933853134

Basic calculations (n = 21131981)

Multiplication

n×y
n×2 42263962
n×3 63395943
n×4 84527924
n×5 105659905

Division

n÷y
n÷2 10565990.5
n÷3 7043993.6666667
n÷3 5282995.25
n÷5 4226396.2

Exponentiation

ny
n2 446560620984361
n3 9.4367105579897E+21
n4 1.9941638821394E+29
n5 4.2140633268256E+36

Nth Root

y√n
2√n 4596.9534476651
3√n 276.4691881208
4√n 67.800836629536
5√n 29.173466878235

Divisors of 21131981

1, 13, 29, 377, 56053, 728689, 1625537, 21131981

8 divisors

τ Total Divisors 8
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -21131980
Sum of the proper positive divisors of n
A Arithmetic Mean 0.125
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 8
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 21131981 can be divided by 8 positive divisors. The sum of these divisors (counting 21131981) is 1, the average is 0.125.

Base conversion 21131981

Base System Value
2 Binary 1010000100111001011001101
3 Ternary 1110202121121222
4 Quaternary 1100213023031
5 Quinary 20402210411
6 Senary 2032533125
8 Octal 120471315
10 Decimal 21131981
12 Duodecimal 70b11a5
16 Hexadecimal 14272cd
20 Vigesimal 6c19j1
36 Base36 ckxjh

Cryptographic Hash Functions

md5 170991b351639c2851c2e3bb2c851818
sha1 48ae24088c690949aeea18061c7bfe6f52dfe557
sha256 d8dd7cd80e7916dc3cc527391ac43e202af7ba853ccd29125e6b92172b9682b1
sha512 b0f5d72f3d834440354ed15e411d486f7939d2b6e9e283fb5797a229254ebe89662bfd1c125fa14984d22c9456bf017cb1cba62185f2d3ce8ca84ddea6a95ca9
ripemd-160 e2d56b52a8f0f44b3c7b722292a79689c35ca953

21131981 as geometric shapes

Circle

Radius = n
Diameter 42263962
Circumference 132776152.5308
Area 1.402911566267E+15

Sphere

Radius = n
Volume 3.9528400750712E+22
Surface area 5.6116462650679E+15
Circumference 132776152.5308

Square

Length = n
Perimeter 84527924
Area 446560620984361
Diagonal 29885134.130011

Cube

Length = n
Surface area 2679363725906166
Volume 9.4367105579897E+21
Space diagonal 36601664.75658

Equilateral Triangle

Length = n
Perimeter 63395943
Area 1.9336642105111E+14
Altitude 18300832.37829

Triangular Pyramid

Length = n
Surface area 1.9336642105111E+14
Volume 1.1121270046082E+21
Height 9961711.3766702