81330991 (number)

81330991 is an odd 8-digits composite number following 81330990 and preceding 81330992. In scientific notation, it is written as 8.1330991 × 10^7. The sum of its digits is 34. It has a total of 4 prime factors and 16 positive divisors. There are 68050944 positive integers (up to 81330991) that are relatively prime to 81330991.

Interesting facts

Basic properties

Name

Name eighty-one million three hundred thirty thousand nine hundred ninety-one

Notation

Scientific notation 8.1330991 × 10^7
Engineering notation 8.1330991 × 10^6

Prime Factorization of 81330991

Prime Factorization 7 × 53 × 853 × 257

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 81330991
Product of the distinct prime numbers

The prime factorization of 81330991 is 7 × 53 × 853 × 257. Since it has a total of 4 prime factors.

Most popular turbo-numbers

6, 8, 32, 67, 309, 55, 6216, 2775, 43709, 60568, 297175, 549486, 3839767, 7318080, 25105141, 9486555, 124838829, 344567055, 9323881803, 6907344194

Basic calculations (n = 81330991)

Multiplication

n×y
n×2 162661982
n×3 243992973
n×4 325323964
n×5 406654955

Division

n÷y
n÷2 40665495.5
n÷3 27110330.333333
n÷3 20332747.75
n÷5 16266198.2

Exponentiation

ny
n2 6614730097042081
n3 5.3798255398996E+23
n4 4.3754654256714E+31
n5 3.5586093915609E+39

Nth Root

y√n
2√n 9018.369642014
3√n 433.26341784578
4√n 94.965096967328
5√n 38.198931308307

Divisors of 81330991

1, 7, 53, 257, 371, 853, 1799, 5971, 13621, 45209, 95347, 219221, 316463, 1534547, 11618713, 81330991

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 -81330990
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 81330991 can be divided by 16 positive divisors. The sum of these divisors (counting 81330991) is 1, the average is 0.0625.

Base conversion 81330991

Base System Value
2 Binary 100110110010000001100101111
3 Ternary 12200001001010221
4 Quaternary 10312100030233
5 Quinary 131310042431
6 Senary 12023112211
8 Octal 466201457
10 Decimal 81330991
12 Duodecimal 232a2667
16 Hexadecimal 4d9032f
20 Vigesimal 158679b
36 Base36 1cf7e7

Cryptographic Hash Functions

md5 449c3cd1c97f2788c917ee5fae555c16
sha1 8a6e347c500a4633ed24030bc96b240c5f34acaa
sha256 0d3a1d4578b1e18b0783d3065fe428ee9f3077bea27b52d976110e5fd843c603
sha512 2136d601eb73fc3121e24fb48e632e059f36ed49b438af2be52a89f2750327068c9ccbaa505d9a98aa5545bcfc9351e88217921bdc50bf203c2d64bc05f26dc4
ripemd-160 e9f7e8dcbec480c527e6c46e2115c5baa9546830

81330991 as geometric shapes

Circle

Radius = n
Diameter 162661982
Circumference 511017687.66956
Area 2.0780787478347E+16

Sphere

Radius = n
Volume 2.2534960524991E+24
Surface area 8.3123149913387E+16
Circumference 511017687.66956

Square

Length = n
Perimeter 325323964
Area 6614730097042081
Diagonal 115019390.51344

Cube

Length = n
Surface area 39688380582252486
Volume 5.3798255398996E+23
Space diagonal 140869408.64193

Equilateral Triangle

Length = n
Perimeter 243992973
Area 2.864262151608E+15
Altitude 70434704.320964

Triangular Pyramid

Length = n
Surface area 2.864262151608E+15
Volume 6.3401852014393E+22
Height 38339796.837815