81291212 (number)

81291212 is an even 8-digits composite number following 81291211 and preceding 81291213. In scientific notation, it is written as 8.1291212 × 10^7. The sum of its digits is 26. It has a total of 4 prime factors and 12 positive divisors. There are 38254656 positive integers (up to 81291212) that are relatively prime to 81291212.

Interesting facts

Basic properties

Name

Name eighty-one million two hundred ninety-one thousand two hundred twelve

Notation

Scientific notation 8.1291212 × 10^7
Engineering notation 8.1291212 × 10^6

Prime Factorization of 81291212

Prime Factorization 2 × 2 × 17 × 1195459

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 40645606
Product of the distinct prime numbers

The prime factorization of 81291212 is 2 × 2 × 17 × 1195459. Since it has a total of 4 prime factors.

Most popular turbo-numbers

6, 10, 89, 61, 380, 798, 7574, 9875, 77763, 43846, 692934, 375402, 1149526, 9563237, 4430424, 42365840, 910736362, 126390283, 6189217145, 7582307869

Basic calculations (n = 81291212)

Multiplication

n×y
n×2 162582424
n×3 243873636
n×4 325164848
n×5 406456060

Division

n÷y
n÷2 40645606
n÷3 27097070.666667
n÷3 20322803
n÷5 16258242.4

Exponentiation

ny
n2 6608261148428944
n3 5.371935579683E+23
n4 4.3669115405835E+31
n5 3.5499153183082E+39

Nth Root

y√n
2√n 9016.1639292994
3√n 433.19276992549
4√n 94.953482976136
5√n 38.195193956444

Divisors of 81291212

1, 2, 4, 17, 34, 68, 1195459, 2390918, 4781836, 20322803, 40645606, 81291212

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 -81291211
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 81291212 can be divided by 12 positive divisors. The sum of these divisors (counting 81291212) is 1, the average is 0.083333333333333.

Base conversion 81291212

Base System Value
2 Binary 100110110000110011111001100
3 Ternary 12122222000120122
4 Quaternary 10312012133030
5 Quinary 131302304322
6 Senary 12022204112
8 Octal 466063714
10 Decimal 81291212
12 Duodecimal 23283638
16 Hexadecimal 4d867cc
20 Vigesimal 158180c
36 Base36 1cecp8

Cryptographic Hash Functions

md5 f0ca9ec8f28c09376c2f4bcc234f9a94
sha1 53a5a47782dc8108cfbb73c2e973d33b8a44d3ae
sha256 0c1f83e1cada91ea9140c635c5cddd93c1f86e04cfbc43ceee3de1b7042dbf11
sha512 cc8f69825af40603baa9c785d9430ed1f24c5381d637ebe2b2ef0b1e9509f630c1597dd404ec1b059f3a4d867a6454fed8540cbdbc93217a7855c239e67ff49b
ripemd-160 07969111b16b45020ac246ef7e134509957ab414

81291212 as geometric shapes

Circle

Radius = n
Diameter 162582424
Circumference 510767748.84122
Area 2.0760464676907E+16

Sphere

Radius = n
Volume 2.250191113692E+24
Surface area 8.3041858707629E+16
Circumference 510767748.84122

Square

Length = n
Perimeter 325164848
Area 6608261148428944
Diagonal 114963134.51215

Cube

Length = n
Surface area 39649566890573664
Volume 5.371935579683E+23
Space diagonal 140800509.39285

Equilateral Triangle

Length = n
Perimeter 243873636
Area 2.8614610146906E+15
Altitude 70400254.696426

Triangular Pyramid

Length = n
Surface area 2.8614610146906E+15
Volume 6.3308867941519E+22
Height 38321044.837382