81213612 (number)

81213612 is an even 8-digits composite number following 81213611 and preceding 81213613. In scientific notation, it is written as 8.1213612 × 10^7. The sum of its digits is 24. It has a total of 4 prime factors and 12 positive divisors. There are 27071200 positive integers (up to 81213612) that are relatively prime to 81213612.

Interesting facts

Basic properties

Name

Name eighty-one million two hundred thirteen thousand six hundred twelve

Notation

Scientific notation 8.1213612 × 10^7
Engineering notation 8.1213612 × 10^6

Prime Factorization of 81213612

Prime Factorization 2 × 2 × 3 × 6767801

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 40606806
Product of the distinct prime numbers

The prime factorization of 81213612 is 2 × 2 × 3 × 6767801. Since it has a total of 4 prime factors.

Most popular turbo-numbers

4, 6, 73, 42, 894, 448, 5457, 7751, 40845, 63362, 438634, 43874, 4414192, 3533148, 80668315, 12930365, 93395821, 514130779, 8009967257, 3636878025

Basic calculations (n = 81213612)

Multiplication

n×y
n×2 162427224
n×3 243640836
n×4 324854448
n×5 406068060

Division

n÷y
n÷2 40606806
n÷3 27071204
n÷3 20303403
n÷5 16242722.4

Exponentiation

ny
n2 6595650774086544
n3 5.3565662285416E+23
n4 4.3502609133708E+31
n5 3.5330040191727E+39

Nth Root

y√n
2√n 9011.8595195442
3√n 433.05488515193
4√n 94.930814383656
5√n 38.187898999531

Divisors of 81213612

1, 2, 3, 4, 6, 12, 6767801, 13535602, 20303403, 27071204, 40606806, 81213612

12 divisors

τ Total Divisors 12
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81213611
Sum of the proper positive divisors of n
A Arithmetic Mean 0.083333333333333
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 12
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81213612 can be divided by 12 positive divisors. The sum of these divisors (counting 81213612) is 1, the average is 0.083333333333333.

Base conversion 81213612

Base System Value
2 Binary 100110101110011100010101100
3 Ternary 12122211002010120
4 Quaternary 10311303202230
5 Quinary 131242313422
6 Senary 12020404540
8 Octal 465634254
10 Decimal 81213612
12 Duodecimal 23246750
16 Hexadecimal 4d738ac
20 Vigesimal 157be0c
36 Base36 1ccoto

Cryptographic Hash Functions

md5 39978d8d57a626b6ca5fc60725155f26
sha1 0e3ef38b7b12e918b14efe528ec04e64c40e23c9
sha256 f5794985db6ef04d04c384dfbb235d38c60a840e29c3910675030a43753638bb
sha512 df4cbd570418400094101e0bc05c246b06467bf11dc41ff26110054f3b8ed26d3ded2404f91c26d15cda566b8e73a8d9facd8a26f7f1d6f6e17aab87776cb47d
ripemd-160 7f0f7b9406bd81f2eb1b59692b0c800d1e587753

81213612 as geometric shapes

Circle

Radius = n
Diameter 162427224
Circumference 510280173.66138
Area 2.0720848017514E+16

Sphere

Radius = n
Volume 2.2437532149405E+24
Surface area 8.2883392070056E+16
Circumference 510280173.66138

Square

Length = n
Perimeter 324854448
Area 6595650774086544
Diagonal 114853391.53971

Cube

Length = n
Surface area 39573904644519264
Volume 5.3565662285416E+23
Space diagonal 140666102.25019

Equilateral Triangle

Length = n
Perimeter 243640836
Area 2.8560005624247E+15
Altitude 70333051.125093

Triangular Pyramid

Length = n
Surface area 2.8560005624247E+15
Volume 6.3127738401277E+22
Height 38284463.846569