81128515 (number)

81128515 is an odd 8-digits composite number following 81128514 and preceding 81128516. In scientific notation, it is written as 8.1128515 × 10^7. The sum of its digits is 31. It has a total of 5 prime factors and 32 positive divisors. There are 57286656 positive integers (up to 81128515) that are relatively prime to 81128515.

Interesting facts

Basic properties

Name

Name eighty-one million one hundred twenty-eight thousand five hundred fifteen

Notation

Scientific notation 8.1128515 × 10^7
Engineering notation 8.1128515 × 10^6

Prime Factorization of 81128515

Prime Factorization 5 × 13 × 29 × 193 × 223

Composite number
ω Distinct Factors 5
Total number of distinct prime factors
Ω Total Factors 5
Total number of prime factors
rad Radical 81128515
Product of the distinct prime numbers

The prime factorization of 81128515 is 5 × 13 × 29 × 193 × 223. Since it has a total of 5 prime factors.

Most popular turbo-numbers

8, 6, 38, 79, 816, 327, 6116, 3709, 70812, 82774, 680455, 48971, 7713450, 9618917, 71077563, 29968057, 296144282, 168454322, 6009730069, 646401358

Basic calculations (n = 81128515)

Multiplication

n×y
n×2 162257030
n×3 243385545
n×4 324514060
n×5 405642575

Division

n÷y
n÷2 40564257.5
n÷3 27042838.333333
n÷3 20282128.75
n÷5 16225703

Exponentiation

ny
n2 6581835946105225
n3 5.3397457628114E+23
n4 4.3320564421443E+31
n5 3.5145330604735E+39

Nth Root

y√n
2√n 9007.136892487
3√n 432.90357820794
4√n 94.905937077124
5√n 38.179892857595

Divisors of 81128515

1, 5, 13, 29, 65, 145, 193, 223, 377, 965, 1115, 1885, 2509, 2899, 5597, 6467, 12545, 14495, 27985, 32335, 43039, 72761, 84071, 215195, 363805, 420355, 559507, 1248131, 2797535, 6240655, 16225703, 81128515

32 divisors

τ Total Divisors 32
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81128514
Sum of the proper positive divisors of n
A Arithmetic Mean 0.03125
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 32
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81128515 can be divided by 32 positive divisors. The sum of these divisors (counting 81128515) is 1, the average is 0.03125.

Base conversion 81128515

Base System Value
2 Binary 100110101011110110001000011
3 Ternary 12122122202101211
4 Quaternary 10311132301003
5 Quinary 131232103030
6 Senary 12014510551
8 Octal 465366103
10 Decimal 81128515
12 Duodecimal 23205457
16 Hexadecimal 4d5ec43
20 Vigesimal 157115f
36 Base36 1cav5v

Cryptographic Hash Functions

md5 66ffd2dfeaabbc9b9d6589a43ff556a5
sha1 fa1676e2bb4228985fd05922a0f14ac6e2c436b2
sha256 b78ac4e1502d405e4027ee8c1b195edf8da15a31dbe9e7521269bfd053cebf85
sha512 037d9f84fc7d2f2418e4aeef661aac6c77f3296cda32da51d28b712fd92a101da9c6e4a548d5cc0ff7a8be45c488ce1dcafc73b053a5216ee6b905dcb8f80a0b
ripemd-160 9f943e95725075a803f714b280343ce95bb24cd4

81128515 as geometric shapes

Circle

Radius = n
Diameter 162257030
Circumference 509745493.4413
Area 2.0677447455417E+16

Sphere

Radius = n
Volume 2.2367074747314E+24
Surface area 8.270978982167E+16
Circumference 509745493.4413

Square

Length = n
Perimeter 324514060
Area 6581835946105225
Diagonal 114733046.20819

Cube

Length = n
Surface area 39491015676631350
Volume 5.3397457628114E+23
Space diagonal 140518709.92261

Equilateral Triangle

Length = n
Perimeter 243385545
Area 2.8500185664344E+15
Altitude 70259354.961307

Triangular Pyramid

Length = n
Surface area 2.8500185664344E+15
Volume 6.2929507311601E+22
Height 38244348.736063