81291231 (number)

81291231 is an odd 8-digits composite number following 81291230 and preceding 81291232. In scientific notation, it is written as 8.1291231 × 10^7. The sum of its digits is 27. It has a total of 4 prime factors and 16 positive divisors. There are 46112976 positive integers (up to 81291231) that are relatively prime to 81291231.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 8.1291231 × 10^7
Engineering notation 8.1291231 × 10^6

Prime Factorization of 81291231

Prime Factorization 9 × 7 × 139 × 9283

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 81291231
Product of the distinct prime numbers

The prime factorization of 81291231 is 9 × 7 × 139 × 9283. Since it has a total of 4 prime factors.

Most popular turbo-numbers

1, 8, 91, 34, 367, 433, 4999, 269, 83884, 12484, 617632, 667498, 6998568, 6531463, 45209060, 38076829, 83611094, 778086773, 1714377080, 6714103896

Basic calculations (n = 81291231)

Multiplication

n×y
n×2 162582462
n×3 243873693
n×4 325164924
n×5 406456155

Division

n÷y
n÷2 40645615.5
n÷3 27097077
n÷3 20322807.75
n÷5 16258246.2

Exponentiation

ny
n2 6608264237495361
n3 5.3719393463927E+23
n4 4.366915623256E+31
n5 3.5499194668761E+39

Nth Root

y√n
2√n 9016.1649829625
3√n 433.19280367519
4√n 94.953488524448
5√n 38.195195741898

Divisors of 81291231

1, 7, 9, 63, 139, 973, 1251, 8757, 9283, 64981, 83547, 584829, 1290337, 9032359, 11613033, 81291231

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 -81291230
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 81291231 can be divided by 16 positive divisors. The sum of these divisors (counting 81291231) is 1, the average is 0.0625.

Base conversion 81291231

Base System Value
2 Binary 100110110000110011111011111
3 Ternary 12122222000121100
4 Quaternary 10312012133133
5 Quinary 131302304411
6 Senary 12022204143
8 Octal 466063737
10 Decimal 81291231
12 Duodecimal 23283653
16 Hexadecimal 4d867df
20 Vigesimal 158181b
36 Base36 1cecpr

Cryptographic Hash Functions

md5 24293794dbcaf800cea6c908d7d30005
sha1 e1276f5e1af06f0b086125426838cf2b58bae68e
sha256 7a4a589986f3ad9518182d0f12ad1c31c5e6a239e0bc422f60d243e51813181d
sha512 9239111b6dfeabaa321a72047fd698fbb1bb86e5aee87c8fd176d24785b11b9b310afe6e7d537652d98708aacc61c2e4212922d19227d883869d59fc282c4e81
ripemd-160 fbe32cc5ca064cd85ec205693846a8fc2c831684

81291231 as geometric shapes

Circle

Radius = n
Diameter 162582462
Circumference 510767868.22174
Area 2.0760474381496E+16

Sphere

Radius = n
Volume 2.2501926914877E+24
Surface area 8.3041897525982E+16
Circumference 510767868.22174

Square

Length = n
Perimeter 325164924
Area 6608264237495361
Diagonal 114963161.3822

Cube

Length = n
Surface area 39649585424972166
Volume 5.3719393463927E+23
Space diagonal 140800542.30182

Equilateral Triangle

Length = n
Perimeter 243873693
Area 2.8614623522956E+15
Altitude 70400271.150909

Triangular Pyramid

Length = n
Surface area 2.8614623522956E+15
Volume 6.3308912332619E+22
Height 38321053.794068