81871641 (number)

81871641 is an odd 8-digits composite number following 81871640 and preceding 81871642. In scientific notation, it is written as 8.1871641 × 10^7. The sum of its digits is 36. It has a total of 5 prime factors and 20 positive divisors. There are 54463968 positive integers (up to 81871641) that are relatively prime to 81871641.

Interesting facts

Basic properties

Name

Name eighty-one million eight hundred seventy-one thousand six hundred forty-one

Notation

Scientific notation 8.1871641 × 10^7
Engineering notation 8.1871641 × 10^6

Prime Factorization of 81871641

Prime Factorization 3 × 3 × 9 × 677 × 1493

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 5
Total number of prime factors
rad Radical 27290547
Product of the distinct prime numbers

The prime factorization of 81871641 is 3 × 3 × 9 × 677 × 1493. Since it has a total of 5 prime factors.

Most popular turbo-numbers

3, 5, 16, 96, 772, 713, 3789, 3073, 38341, 78345, 214409, 680647, 9448801, 8428580, 35563371, 41713449, 764615112, 408899676, 6287293587, 6116308453

Basic calculations (n = 81871641)

Multiplication

n×y
n×2 163743282
n×3 245614923
n×4 327486564
n×5 409358205

Division

n÷y
n÷2 40935820.5
n÷3 27290547
n÷3 20467910.25
n÷5 16374328.2

Exponentiation

ny
n2 6702965600032881
n3 5.4878279324124E+23
n4 4.4929747835224E+31
n5 3.678472184986E+39

Nth Root

y√n
2√n 9048.2949222492
3√n 434.22134185848
4√n 95.122525840356
5√n 38.249582494052

Divisors of 81871641

1, 3, 9, 27, 81, 677, 1493, 2031, 4479, 6093, 13437, 18279, 40311, 54837, 120933, 1010761, 3032283, 9096849, 27290547, 81871641

20 divisors

τ Total Divisors 20
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81871640
Sum of the proper positive divisors of n
A Arithmetic Mean 0.05
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 20
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81871641 can be divided by 20 positive divisors. The sum of these divisors (counting 81871641) is 1, the average is 0.05.

Base conversion 81871641

Base System Value
2 Binary 100111000010100001100011001
3 Ternary 12201001111210000
4 Quaternary 10320110030121
5 Quinary 131424343031
6 Senary 12042443213
8 Octal 470241431
10 Decimal 81871641
12 Duodecimal 23503509
16 Hexadecimal 4e14319
20 Vigesimal 15bdj21
36 Base36 1cqsk9

Cryptographic Hash Functions

md5 79dc6159c32f62be7ea2ec232474e34a
sha1 2c6292a9763bea992343f945fb815ff270b02c75
sha256 e0945a0a0c48d37829bf62aa4beecba1c7d4c0a4d1e929e5c97f58ead7cd3c84
sha512 0f29c3c2a265766a14d60318f23eeaed29546807ff961bf36e5b1680ee737675725c2654cf4baf32f6ad266b3d4649e4f06e674bc143af8c48ad190a7890cbaa
ripemd-160 3a3877510a348bf4e2e5aabf5dbdbd9e9f4fdbf9

81871641 as geometric shapes

Circle

Radius = n
Diameter 163743282
Circumference 514414691.80588
Area 2.1057987486328E+16

Sphere

Radius = n
Volume 2.2987359888842E+24
Surface area 8.4231949945314E+16
Circumference 514414691.80588

Square

Length = n
Perimeter 327486564
Area 6702965600032881
Diagonal 115783985.07594

Cube

Length = n
Surface area 40217793600197286
Volume 5.4878279324124E+23
Space diagonal 141805841.91104

Equilateral Triangle

Length = n
Perimeter 245614923
Area 2.9024692451608E+15
Altitude 70902920.95552

Triangular Pyramid

Length = n
Surface area 2.9024692451608E+15
Volume 6.4674672416563E+22
Height 38594661.69198