81312085 (number)

81312085 is an odd 8-digits composite number following 81312084 and preceding 81312086. In scientific notation, it is written as 8.1312085 × 10^7. The sum of its digits is 28. It has a total of 4 prime factors and 16 positive divisors. There are 61582080 positive integers (up to 81312085) that are relatively prime to 81312085.

Interesting facts

Basic properties

Name

Name eighty-one million three hundred twelve thousand eighty-five

Notation

Scientific notation 8.1312085 × 10^7
Engineering notation 8.1312085 × 10^6

Prime Factorization of 81312085

Prime Factorization 5 × 1769 × 29 × 317

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 81312085
Product of the distinct prime numbers

The prime factorization of 81312085 is 5 × 1769 × 29 × 317. Since it has a total of 4 prime factors.

Most popular turbo-numbers

10, 8, 13, 85, 251, 396, 6437, 8743, 49509, 36965, 929117, 921802, 4446514, 3524165, 84860550, 43368790, 387410828, 491258912, 2416064581, 1244805390

Basic calculations (n = 81312085)

Multiplication

n×y
n×2 162624170
n×3 243936255
n×4 325248340
n×5 406560425

Division

n÷y
n÷2 40656042.5
n÷3 27104028.333333
n÷3 20328021.25
n÷5 16262417

Exponentiation

ny
n2 6611655167047225
n3 5.3760746693363E+23
n4 4.3713984047942E+31
n5 3.5544751865949E+39

Nth Root

y√n
2√n 9017.321387197
3√n 433.22984346506
4√n 94.959577648581
5√n 38.19715521743

Divisors of 81312085

1, 5, 29, 145, 317, 1585, 1769, 8845, 9193, 45965, 51301, 256505, 560773, 2803865, 16262417, 81312085

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 -81312084
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 81312085 can be divided by 16 positive divisors. The sum of these divisors (counting 81312085) is 1, the average is 0.0625.

Base conversion 81312085

Base System Value
2 Binary 100110110001011100101010101
3 Ternary 12200000002012201
4 Quaternary 10312023211111
5 Quinary 131303441320
6 Senary 12022444501
8 Octal 466134525
10 Decimal 81312085
12 Duodecimal 23293731
16 Hexadecimal 4d8b955
20 Vigesimal 1584045
36 Base36 1cest1

Cryptographic Hash Functions

md5 1419a83d8c7e3cd737464658564d3db7
sha1 ee1c4a64496c474d6df0f4d002a0653513d367a2
sha256 7a87b6fcacdccd1541cb972980f145b6f30ed3aa9123fa628cffd40f8d332e47
sha512 0adbff64906137a5f51e11a6506224e17400e12e51141e11117cb1b2e5ca1e04ee62518fc4deb5cea681ab069c8733d323de7e59743ee34081dc3f8deef9cb4c
ripemd-160 61f4b790fbd8c9561001d64d486018575b831c28

81312085 as geometric shapes

Circle

Radius = n
Diameter 162624170
Circumference 510898897.76814
Area 2.0771127300865E+16

Sphere

Radius = n
Volume 2.2519248915116E+24
Surface area 8.3084509203458E+16
Circumference 510898897.76814

Square

Length = n
Perimeter 325248340
Area 6611655167047225
Diagonal 114992653.39183

Cube

Length = n
Surface area 39669931002283350
Volume 5.3760746693363E+23
Space diagonal 140836662.48936

Equilateral Triangle

Length = n
Perimeter 243936255
Area 2.8629306678628E+15
Altitude 70418331.24468

Triangular Pyramid

Length = n
Surface area 2.8629306678628E+15
Volume 6.3357647580882E+22
Height 38330884.463945