81685212 (number)

81685212 is an even 8-digits composite number following 81685211 and preceding 81685213. In scientific notation, it is written as 8.1685212 × 10^7. The sum of its digits is 33. It has a total of 5 prime factors and 24 positive divisors. There are 23338608 positive integers (up to 81685212) that are relatively prime to 81685212.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 8.1685212 × 10^7
Engineering notation 8.1685212 × 10^6

Prime Factorization of 81685212

Prime Factorization 2 × 2 × 3 × 7 × 972443

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 5
Total number of prime factors
rad Radical 40842606
Product of the distinct prime numbers

The prime factorization of 81685212 is 2 × 2 × 3 × 7 × 972443. Since it has a total of 5 prime factors.

Most popular turbo-numbers

4, 1, 94, 17, 40, 754, 2188, 3881, 52445, 39912, 302743, 133599, 6198965, 6386326, 30262269, 79716039, 113507251, 447635643, 880173705, 5991208884

Basic calculations (n = 81685212)

Multiplication

n×y
n×2 163370424
n×3 245055636
n×4 326740848
n×5 408426060

Division

n÷y
n÷2 40842606
n÷3 27228404
n÷3 20421303
n÷5 16337042.4

Exponentiation

ny
n2 6672473859484944
n3 5.4504244177649E+23
n4 4.452190740551E+31
n5 3.6367814450634E+39

Nth Root

y√n
2√n 9037.9871652929
3√n 433.89150451819
4√n 95.068328928687
5√n 38.232147066521

Divisors of 81685212

1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84, 972443, 1944886, 2917329, 3889772, 5834658, 6807101, 11669316, 13614202, 20421303, 27228404, 40842606, 81685212

24 divisors

τ Total Divisors 24
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81685211
Sum of the proper positive divisors of n
A Arithmetic Mean 0.041666666666667
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 24
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81685212 can be divided by 24 positive divisors. The sum of these divisors (counting 81685212) is 1, the average is 0.041666666666667.

Base conversion 81685212

Base System Value
2 Binary 100110111100110101011011100
3 Ternary 12200201001001020
4 Quaternary 10313212223130
5 Quinary 131402411322
6 Senary 12034444140
8 Octal 467465334
10 Decimal 81685212
12 Duodecimal 23433650
16 Hexadecimal 4de6adc
20 Vigesimal 15aad0c
36 Base36 1cmspo

Cryptographic Hash Functions

md5 d00dcba06531efe833ea2b46358c6967
sha1 4168b05b9932153f156714441b31f43926d64095
sha256 c6071871f74f4ffd7bcd26406df25338d274b25ad4e86fc24bedfdcc652f8fc1
sha512 2dff96a27be3e176387c7f54e08f5cf09f199a1eb19607ee1318659016665b56825b96836bd1847e4e2b330bf376b7c81e50cb93500af50f38c96a6e8edc6506
ripemd-160 03029e1920ca1dbfda051b84b49a4dd1da2803b1

81685212 as geometric shapes

Circle

Radius = n
Diameter 163370424
Circumference 513243323.85225
Area 2.0962194858228E+16

Sphere

Radius = n
Volume 2.2830684413062E+24
Surface area 8.3848779432911E+16
Circumference 513243323.85225

Square

Length = n
Perimeter 326740848
Area 6672473859484944
Diagonal 115520334.65572

Cube

Length = n
Surface area 40034843156909664
Volume 5.4504244177649E+23
Space diagonal 141482937.41103

Equilateral Triangle

Length = n
Perimeter 245055636
Area 2.8892659342008E+15
Altitude 70741468.705517

Triangular Pyramid

Length = n
Surface area 2.8892659342008E+15
Volume 6.4233867769105E+22
Height 38506778.218574