81090915 (number)

81090915 is an odd 8-digits composite number following 81090914 and preceding 81090916. In scientific notation, it is written as 8.1090915 × 10^7. The sum of its digits is 33. It has a total of 4 prime factors and 16 positive divisors. There are 43142400 positive integers (up to 81090915) that are relatively prime to 81090915.

Interesting facts

Basic properties

Name

Name eighty-one million ninety thousand nine hundred fifteen

Notation

Scientific notation 8.1090915 × 10^7
Engineering notation 8.1090915 × 10^6

Prime Factorization of 81090915

Prime Factorization 3 × 5 × 421 × 12841

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 81090915
Product of the distinct prime numbers

The prime factorization of 81090915 is 3 × 5 × 421 × 12841. Since it has a total of 4 prime factors.

Most popular turbo-numbers

1, 4, 47, 61, 73, 991, 5725, 2205, 79682, 36113, 407790, 45983, 5622015, 7212083, 23738345, 3062760, 730646920, 289330213, 5174674582, 2650539913

Basic calculations (n = 81090915)

Multiplication

n×y
n×2 162181830
n×3 243272745
n×4 324363660
n×5 405454575

Division

n÷y
n÷2 40545457.5
n÷3 27030305
n÷3 20272728.75
n÷5 16218183

Exponentiation

ny
n2 6575736495537225
n3 5.3323248922201E+23
n4 4.324031045874E+31
n5 3.5063963399833E+39

Nth Root

y√n
2√n 9005.049416855
3√n 432.83668972527
4√n 94.894938836879
5√n 38.176353213914

Divisors of 81090915

1, 3, 5, 15, 421, 1263, 2105, 6315, 12841, 38523, 64205, 192615, 5406061, 16218183, 27030305, 81090915

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 -81090914
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 81090915 can be divided by 16 positive divisors. The sum of these divisors (counting 81090915) is 1, the average is 0.0625.

Base conversion 81090915

Base System Value
2 Binary 100110101010101100101100011
3 Ternary 12122120211211020
4 Quaternary 10311111211203
5 Quinary 131224402130
6 Senary 12014020523
8 Octal 465254543
10 Decimal 81090915
12 Duodecimal 231a7743
16 Hexadecimal 4d55963
20 Vigesimal 156g75f
36 Base36 1ca25f

Cryptographic Hash Functions

md5 d31eb5bf0ec7190c567c182ee0bb46fd
sha1 b6c3786231c74dd3e0ed79a3dd98e35cd4054cea
sha256 705ed745c0c441a4dd62e2ef1f394f8c718215772726a26df99b89b66cd9aaef
sha512 dd2ae114ba2f693830183044eb1fd5d39031adce06b3d7a304e95488c33019433745af3eb310b3c6df3d5660a4e64f1682821f22e5daf783da3878d1fba11d74
ripemd-160 4b1f162f11afa995dc46b32b6b660774a35e7510

81090915 as geometric shapes

Circle

Radius = n
Diameter 162181830
Circumference 509509245.67375
Area 2.0658285466322E+16

Sphere

Radius = n
Volume 2.233599027727E+24
Surface area 8.2633141865288E+16
Circumference 509509245.67375

Square

Length = n
Perimeter 324363660
Area 6575736495537225
Diagonal 114679871.77824

Cube

Length = n
Surface area 39454418973223350
Volume 5.3323248922201E+23
Space diagonal 140453584.81225

Equilateral Triangle

Length = n
Perimeter 243272745
Area 2.8473774268638E+15
Altitude 70226792.406125

Triangular Pyramid

Length = n
Surface area 2.8473774268638E+15
Volume 6.2842051512977E+22
Height 38226623.926081