81491310 (number)

81491310 is an even 8-digits composite number following 81491309 and preceding 81491311. In scientific notation, it is written as 8.1491310 × 10^7. The sum of its digits is 27. It has a total of 4 prime factors and 16 positive divisors. There are 21669120 positive integers (up to 81491310) that are relatively prime to 81491310.

Interesting facts

Basic properties

Name

Name eighty-one million four hundred ninety-one thousand three hundred ten

Notation

Scientific notation 8.1491310 × 10^7
Engineering notation 8.1491310 × 10^6

Prime Factorization of 81491310

Prime Factorization 2 × 45 × 419 × 2161

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 81491310
Product of the distinct prime numbers

The prime factorization of 81491310 is 2 × 45 × 419 × 2161. Since it has a total of 4 prime factors.

Most popular turbo-numbers

9, 10, 4, 41, 951, 258, 6378, 6345, 40893, 19538, 143296, 9119, 9545433, 6055327, 50829485, 63785482, 226174006, 88451317, 9997807765, 2183485473

Basic calculations (n = 81491310)

Multiplication

n×y
n×2 162982620
n×3 244473930
n×4 325965240
n×5 407456550

Division

n÷y
n÷2 40745655
n÷3 27163770
n÷3 20372827.5
n÷5 16298262

Exponentiation

ny
n2 6640833605516100
n3 5.4117023000553E+23
n4 4.4100670976152E+31
n5 3.5938214497256E+39

Nth Root

y√n
2√n 9027.2537352176
3√n 433.54791279269
4√n 95.011861023862
5√n 38.213978933949

Divisors of 81491310

1, 2, 45, 90, 419, 838, 2161, 4322, 18855, 37710, 97245, 194490, 905459, 1810918, 40745655, 81491310

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 -81491309
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 81491310 can be divided by 16 positive divisors. The sum of these divisors (counting 81491310) is 1, the average is 0.0625.

Base conversion 81491310

Base System Value
2 Binary 100110110110111010101101110
3 Ternary 12200100012001200
4 Quaternary 10312313111232
5 Quinary 131330210220
6 Senary 12030350330
8 Octal 466672556
10 Decimal 81491310
12 Duodecimal 2335b3a6
16 Hexadecimal 4db756e
20 Vigesimal 159685a
36 Base36 1cin3i

Cryptographic Hash Functions

md5 cde85c79327574de0bf1fe2c57362fee
sha1 e582b742fa73a49e661bd37bf33bd8646ba888d8
sha256 b1f449a5688342beaec4ffb34980cfa8b5c3528cb35a28ad1c8d59cfb0c14730
sha512 7c25de1a2eeab7462a9791ca4879b6de1643343de7589e172519e867cbfeb26d99d0d5cb40baed2bc72b2a3084b228b59048a2a0c7bf9b14217ef73e91dc599d
ripemd-160 e4672eef8380a04f5d01da40446bb0d1946beebd

81491310 as geometric shapes

Circle

Radius = n
Diameter 162982620
Circumference 512025001.65482
Area 2.0862794068802E+16

Sphere

Radius = n
Volume 2.2668485585692E+24
Surface area 8.3451176275206E+16
Circumference 512025001.65482

Square

Length = n
Perimeter 325965240
Area 6640833605516100
Diagonal 115246115.81755

Cube

Length = n
Surface area 39845001633096600
Volume 5.4117023000553E+23
Space diagonal 141147089.29535

Equilateral Triangle

Length = n
Perimeter 244473930
Area 2.8755653023412E+15
Altitude 70573544.647673

Triangular Pyramid

Length = n
Surface area 2.8755653023412E+15
Volume 6.3777523235532E+22
Height 38415371.939183