81342642 (number)

81342642 is an even 8-digits composite number following 81342641 and preceding 81342643. In scientific notation, it is written as 8.1342642 × 10^7. The sum of its digits is 30. It has a total of 4 prime factors and 16 positive divisors. There are 26941200 positive integers (up to 81342642) that are relatively prime to 81342642.

Interesting facts

Basic properties

Name

Name eighty-one million three hundred forty-two thousand six hundred forty-two

Notation

Scientific notation 8.1342642 × 10^7
Engineering notation 8.1342642 × 10^6

Prime Factorization of 81342642

Prime Factorization 2 × 3 × 157 × 86351

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 81342642
Product of the distinct prime numbers

The prime factorization of 81342642 is 2 × 3 × 157 × 86351. Since it has a total of 4 prime factors.

Most popular turbo-numbers

1, 8, 21, 59, 61, 660, 7344, 7439, 31420, 84014, 354278, 384559, 2866527, 9394944, 86476127, 89490343, 734774813, 143065274, 4842987004, 9760281257

Basic calculations (n = 81342642)

Multiplication

n×y
n×2 162685284
n×3 244027926
n×4 325370568
n×5 406713210

Division

n÷y
n÷2 40671321
n÷3 27114214
n÷3 20335660.5
n÷5 16268528.4

Exponentiation

ny
n2 6616625407540164
n3 5.3821379177364E+23
n4 4.3779731783706E+31
n5 3.561159049338E+39

Nth Root

y√n
2√n 9019.0155782103
3√n 433.28410578196
4√n 94.968497820121
5√n 38.200025676501

Divisors of 81342642

1, 2, 3, 6, 157, 314, 471, 942, 86351, 172702, 259053, 518106, 13557107, 27114214, 40671321, 81342642

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 -81342641
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 81342642 can be divided by 16 positive divisors. The sum of these divisors (counting 81342642) is 1, the average is 0.0625.

Base conversion 81342642

Base System Value
2 Binary 100110110010011000010110010
3 Ternary 12200001122010110
4 Quaternary 10312103002302
5 Quinary 131310431032
6 Senary 12023242150
8 Octal 466230262
10 Decimal 81342642
12 Duodecimal 232a9356
16 Hexadecimal 4d930b2
20 Vigesimal 1587gc2
36 Base36 1cfgdu

Cryptographic Hash Functions

md5 a86e1fa31778d7ee2cf116863f36ef54
sha1 3c59b6e18bfc870504280692c195a666012963c5
sha256 a24fb8355a0a5d8912af74b13959def57274ffe8ab84fc14e90d8c94107acf21
sha512 521d11841ce6de8de3feed9550cbd1e87a9e982bb39d187089152f8505230730dba1274e761d811655e761cda1d3d85b8c198768be66815e46f8b5c5563975a9
ripemd-160 0bfcdb0bcc3b4f26ad021ecbb4c8ac7b10cf6b48

81342642 as geometric shapes

Circle

Radius = n
Diameter 162685284
Circumference 511090893.06157
Area 2.0786741771884E+16

Sphere

Radius = n
Volume 2.2544646590624E+24
Surface area 8.3146967087535E+16
Circumference 511090893.06157

Square

Length = n
Perimeter 325370568
Area 6616625407540164
Diagonal 115035867.51566

Cube

Length = n
Surface area 39699752445240984
Volume 5.3821379177364E+23
Space diagonal 140889588.76589

Equilateral Triangle

Length = n
Perimeter 244027926
Area 2.8650828451277E+15
Altitude 70444794.382943

Triangular Pyramid

Length = n
Surface area 2.8650828451277E+15
Volume 6.3429103648545E+22
Height 38345289.171886