81091372 (number)

81091372 is an even 8-digits composite number following 81091371 and preceding 81091373. In scientific notation, it is written as 8.1091372 × 10^7. The sum of its digits is 31. It has a total of 4 prime factors and 12 positive divisors. There are 39974480 positive integers (up to 81091372) that are relatively prime to 81091372.

Interesting facts

Basic properties

Name

Name eighty-one million ninety-one thousand three hundred seventy-two

Notation

Scientific notation 8.1091372 × 10^7
Engineering notation 8.1091372 × 10^6

Prime Factorization of 81091372

Prime Factorization 2 × 2 × 71 × 285533

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 40545686
Product of the distinct prime numbers

The prime factorization of 81091372 is 2 × 2 × 71 × 285533. Since it has a total of 4 prime factors.

Most popular turbo-numbers

7, 1, 95, 91, 916, 512, 2277, 2807, 22990, 86839, 796054, 709363, 655852, 2809803, 82750227, 63949655, 246900449, 559415324, 942950484, 2924041717

Basic calculations (n = 81091372)

Multiplication

n×y
n×2 162182744
n×3 243274116
n×4 324365488
n×5 405456860

Division

n÷y
n÷2 40545686
n÷3 27030457.333333
n÷3 20272843
n÷5 16218274.4

Exponentiation

ny
n2 6575810612842384
n3 5.3324150460755E+23
n4 4.3241285215971E+31
n5 3.5064951452064E+39

Nth Root

y√n
2√n 9005.0747914718
3√n 432.83750282908
4√n 94.895072535257
5√n 38.176396243529

Divisors of 81091372

1, 2, 4, 71, 142, 284, 285533, 571066, 1142132, 20272843, 40545686, 81091372

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 -81091371
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 81091372 can be divided by 12 positive divisors. The sum of these divisors (counting 81091372) is 1, the average is 0.083333333333333.

Base conversion 81091372

Base System Value
2 Binary 100110101010101101100101100
3 Ternary 12122120212110011
4 Quaternary 10311111230230
5 Quinary 131224410442
6 Senary 12014023004
8 Octal 465255454
10 Decimal 81091372
12 Duodecimal 231a7a64
16 Hexadecimal 4d55b2c
20 Vigesimal 156g88c
36 Base36 1ca2i4

Cryptographic Hash Functions

md5 176669a3386de22de777d813c4e57bd2
sha1 d9d5f0a9ec1ba08093284d7981784398a0216df6
sha256 8d48a79efc26469b090dbef409c47df7265a73e884c4ef050a9525530210d26c
sha512 36541b3ea54187309205e48ebdc859cef437f816b6bed3f0150f0a4b0fbdddc2175e6b9cfdfc7953188fa89b8138206c564c4bbd9dc48a1a83d11e2941936498
ripemd-160 e0f9ac61928fdc027ac5f20445f66912703b7af6

81091372 as geometric shapes

Circle

Radius = n
Diameter 162182744
Circumference 509512117.08943
Area 2.0658518312703E+16

Sphere

Radius = n
Volume 2.2336367912857E+24
Surface area 8.2634073250814E+16
Circumference 509512117.08943

Square

Length = n
Perimeter 324365488
Area 6575810612842384
Diagonal 114680518.07384

Cube

Length = n
Surface area 39454863677054304
Volume 5.3324150460755E+23
Space diagonal 140454376.35947

Equilateral Triangle

Length = n
Perimeter 243274116
Area 2.8474095205984E+15
Altitude 70227188.179734

Triangular Pyramid

Length = n
Surface area 2.8474095205984E+15
Volume 6.2843113986353E+22
Height 38226839.357947