81088891 (number)

81088891 is an odd 8-digits composite number following 81088890 and preceding 81088892. In scientific notation, it is written as 8.1088891 × 10^7. The sum of its digits is 43. It has a total of 3 prime factors and 8 positive divisors. There are 74571840 positive integers (up to 81088891) that are relatively prime to 81088891.

Interesting facts

Basic properties

Name

Name eighty-one million eighty-eight thousand eight hundred ninety-one

Notation

Scientific notation 8.1088891 × 10^7
Engineering notation 8.1088891 × 10^6

Prime Factorization of 81088891

Prime Factorization 13 × 271 × 23017

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 3
Total number of prime factors
rad Radical 81088891
Product of the distinct prime numbers

The prime factorization of 81088891 is 13 × 271 × 23017. Since it has a total of 3 prime factors.

Most popular turbo-numbers

2, 5, 73, 37, 618, 333, 7013, 1993, 62666, 86283, 200941, 957739, 4340678, 9339569, 27520368, 85430379, 406155309, 638662045, 4869994179, 523471866

Basic calculations (n = 81088891)

Multiplication

n×y
n×2 162177782
n×3 243266673
n×4 324355564
n×5 405444455

Division

n÷y
n÷2 40544445.5
n÷3 27029630.333333
n÷3 20272222.75
n÷5 16217778.2

Exponentiation

ny
n2 6575408243609881
n3 5.3319256234658E+23
n4 4.3235993570133E+31
n5 3.5059587698852E+39

Nth Root

y√n
2√n 9004.9370347604
3√n 432.83308854608
4√n 94.894346695472
5√n 38.176162638409

Divisors of 81088891

1, 13, 271, 3523, 23017, 299221, 6237607, 81088891

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 -81088890
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 81088891 can be divided by 8 positive divisors. The sum of these divisors (counting 81088891) is 1, the average is 0.125.

Base conversion 81088891

Base System Value
2 Binary 100110101010101000101111011
3 Ternary 12122120202001021
4 Quaternary 10311111011323
5 Quinary 131224321031
6 Senary 12014003311
8 Octal 465250573
10 Decimal 81088891
12 Duodecimal 231a6537
16 Hexadecimal 4d5517b
20 Vigesimal 156g24b
36 Base36 1ca0l7

Cryptographic Hash Functions

md5 91fe226674c0332bb6790069602a89cb
sha1 8c35962ad847d567564e820ec786e15e0cc6080e
sha256 e63a55c6536c112e2330d25de40a3476ba09c1714765d714a45b1cb39c9ad104
sha512 56e77419eb41ab9f402c4f699108c5757d0d32253ec75c9131c73f69a47628dad333e58faa3c3a264c84489ce0505f072a323533b8a387266975070bbaceba77
ripemd-160 3b537b772ee7c58f29e397feb845e90d5d825f2e

81088891 as geometric shapes

Circle

Radius = n
Diameter 162177782
Circumference 509496528.50669
Area 2.0657254232479E+16

Sphere

Radius = n
Volume 2.2334317824223E+24
Surface area 8.2629016929914E+16
Circumference 509496528.50669

Square

Length = n
Perimeter 324355564
Area 6575408243609881
Diagonal 114677009.40999

Cube

Length = n
Surface area 39452449461659286
Volume 5.3319256234658E+23
Space diagonal 140450079.14141

Equilateral Triangle

Length = n
Perimeter 243266673
Area 2.8472352896099E+15
Altitude 70225039.570707

Triangular Pyramid

Length = n
Surface area 2.8472352896099E+15
Volume 6.2837346085583E+22
Height 38225669.803331