81131285 (number)

81131285 is an odd 8-digits composite number following 81131284 and preceding 81131286. In scientific notation, it is written as 8.1131285 × 10^7. The sum of its digits is 29. It has a total of 4 prime factors and 12 positive divisors. There are 64078848 positive integers (up to 81131285) that are relatively prime to 81131285.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 8.1131285 × 10^7
Engineering notation 8.1131285 × 10^6

Prime Factorization of 81131285

Prime Factorization 5 × 97 × 409 × 409

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 198365
Product of the distinct prime numbers

The prime factorization of 81131285 is 5 × 97 × 409 × 409. Since it has a total of 4 prime factors.

Most popular turbo-numbers

6, 10, 83, 85, 671, 671, 3017, 8810, 76247, 46731, 600182, 467940, 1175406, 9049744, 64728392, 85711684, 773194388, 180835748, 2142383393, 8029914029

Basic calculations (n = 81131285)

Multiplication

n×y
n×2 162262570
n×3 243393855
n×4 324525140
n×5 405656425

Division

n÷y
n÷2 40565642.5
n÷3 27043761.666667
n÷3 20282821.25
n÷5 16226257

Exponentiation

ny
n2 6582285405751225
n3 5.3402927320534E+23
n4 4.3326481162766E+31
n5 3.5151330912635E+39

Nth Root

y√n
2√n 9007.290658128
3√n 432.90850507927
4√n 94.906747168618
5√n 38.180153571991

Divisors of 81131285

1, 5, 97, 409, 485, 2045, 39673, 167281, 198365, 836405, 16226257, 81131285

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 -81131284
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 81131285 can be divided by 12 positive divisors. The sum of these divisors (counting 81131285) is 1, the average is 0.083333333333333.

Base conversion 81131285

Base System Value
2 Binary 100110101011111011100010101
3 Ternary 12122122220012102
4 Quaternary 10311133130111
5 Quinary 131232200120
6 Senary 12014531445
8 Octal 465373425
10 Decimal 81131285
12 Duodecimal 23206b85
16 Hexadecimal 4d5f715
20 Vigesimal 1571845
36 Base36 1caxat

Cryptographic Hash Functions

md5 3d4acea35ca381871db061c2b11c721b
sha1 823e39950ce41ab29e3d7cc8f3c5c5fd14c2f769
sha256 525045a140460c9ac9ebda73e202c16555d8c818e193fd5eaa5067effb6cd806
sha512 30518da0cbc941982ecc29e7be01c398760bdc36f93f5e86a728225946dd3c6536c10a209b7beb31fba268686f6120fdf71bd2bc33d510968b3ec4bd98dd8f79
ripemd-160 9d72a6a9ee8308dd1a994fc2f51c12067ef437dc

81131285 as geometric shapes

Circle

Radius = n
Diameter 162262570
Circumference 509762897.8646
Area 2.0678859474539E+16

Sphere

Radius = n
Volume 2.2369365886717E+24
Surface area 8.2715437898157E+16
Circumference 509762897.8646

Square

Length = n
Perimeter 324525140
Area 6582285405751225
Diagonal 114736963.57976

Cube

Length = n
Surface area 39493712434507350
Volume 5.3402927320534E+23
Space diagonal 140523507.70335

Equilateral Triangle

Length = n
Perimeter 243393855
Area 2.8502131881701E+15
Altitude 70261753.851675

Triangular Pyramid

Length = n
Surface area 2.8502131881701E+15
Volume 6.2935953405937E+22
Height 38245654.526586