81215512 (number)

81215512 is an even 8-digits composite number following 81215511 and preceding 81215513. In scientific notation, it is written as 8.1215512 × 10^7. The sum of its digits is 25. It has a total of 5 prime factors and 16 positive divisors. There are 34806624 positive integers (up to 81215512) that are relatively prime to 81215512.

Interesting facts

Basic properties

Name

Name eighty-one million two hundred fifteen thousand five hundred twelve

Notation

Scientific notation 8.1215512 × 10^7
Engineering notation 8.1215512 × 10^6

Prime Factorization of 81215512

Prime Factorization 2 × 2 × 2 × 7 × 1450277

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 5
Total number of prime factors
rad Radical 20303878
Product of the distinct prime numbers

The prime factorization of 81215512 is 2 × 2 × 2 × 7 × 1450277. Since it has a total of 5 prime factors.

Most popular turbo-numbers

8, 7, 22, 75, 487, 474, 8269, 1112, 44405, 11814, 968988, 117925, 3902560, 9617216, 9802885, 17955712, 195743962, 865041251, 7598327121, 1788778919

Basic calculations (n = 81215512)

Multiplication

n×y
n×2 162431024
n×3 243646536
n×4 324862048
n×5 406077560

Division

n÷y
n÷2 40607756
n÷3 27071837.333333
n÷3 20303878
n÷5 16243102.4

Exponentiation

ny
n2 6595959389422144
n3 5.3569421894313E+23
n4 4.3506680266906E+31
n5 3.5334173132971E+39

Nth Root

y√n
2√n 9011.9649355732
3√n 433.05826224536
4√n 94.931369607592
5√n 38.188077679748

Divisors of 81215512

1, 2, 4, 7, 8, 14, 28, 56, 1450277, 2900554, 5801108, 10151939, 11602216, 20303878, 40607756, 81215512

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 -81215511
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 81215512 can be divided by 16 positive divisors. The sum of these divisors (counting 81215512) is 1, the average is 0.0625.

Base conversion 81215512

Base System Value
2 Binary 100110101110100000000011000
3 Ternary 12122211011201221
4 Quaternary 10311310000120
5 Quinary 131242344022
6 Senary 12020421424
8 Octal 465640030
10 Decimal 81215512
12 Duodecimal 23247874
16 Hexadecimal 4d74018
20 Vigesimal 157bifc
36 Base36 1ccqag

Cryptographic Hash Functions

md5 b4b6e5a6e63d3e312477610b6fbefe3d
sha1 73b40a3065bf5008d77fd631fccd98e6e60f846a
sha256 51a84d3513a1059f086e8152c570740023532a1691ce5fc56506a5f2fcb22c38
sha512 153218ea102d82cc7b9468f2440516aca7b95805e32a118c9ded98c9695db94ffbbabeb37fd1cfe2137a4783acf595521c5a5f1a3603e235d1c2a2461a6742f8
ripemd-160 c9867a02fad19c0dfe186e672b0505c097775368

81215512 as geometric shapes

Circle

Radius = n
Diameter 162431024
Circumference 510292111.71347
Area 2.0721817561185E+16

Sphere

Radius = n
Volume 2.2439106970697E+24
Surface area 8.2887270244741E+16
Circumference 510292111.71347

Square

Length = n
Perimeter 324862048
Area 6595959389422144
Diagonal 114856078.54547

Cube

Length = n
Surface area 39575756336532864
Volume 5.3569421894313E+23
Space diagonal 140669393.14672

Equilateral Triangle

Length = n
Perimeter 243646536
Area 2.856134196785E+15
Altitude 70334696.57336

Triangular Pyramid

Length = n
Surface area 2.856134196785E+15
Volume 6.3132169142853E+22
Height 38285359.515158