81931490 (number)

81931490 is an even 8-digits composite number following 81931489 and preceding 81931491. In scientific notation, it is written as 8.1931490 × 10^7. The sum of its digits is 35. It has a total of 4 prime factors and 16 positive divisors. There are 32742144 positive integers (up to 81931490) that are relatively prime to 81931490.

Interesting facts

Basic properties

Name

Name eighty-one million nine hundred thirty-one thousand four hundred ninety

Notation

Scientific notation 8.1931490 × 10^7
Engineering notation 8.1931490 × 10^6

Prime Factorization of 81931490

Prime Factorization 2 × 5 × 1297 × 6317

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 81931490
Product of the distinct prime numbers

The prime factorization of 81931490 is 2 × 5 × 1297 × 6317. Since it has a total of 4 prime factors.

Most popular turbo-numbers

1, 5, 70, 37, 282, 904, 6720, 1882, 6586, 40725, 150191, 602923, 380818, 6885938, 18974123, 53331939, 99429752, 515978625, 8962647877, 1647837120

Basic calculations (n = 81931490)

Multiplication

n×y
n×2 163862980
n×3 245794470
n×4 327725960
n×5 409657450

Division

n÷y
n÷2 40965745
n÷3 27310496.666667
n÷3 20482872.5
n÷5 16386298

Exponentiation

ny
n2 6712769053620100
n3 5.4998717058898E+23
n4 4.506126836724E+31
n5 3.6919368586178E+39

Nth Root

y√n
2√n 9051.601515754
3√n 434.32712282209
4√n 95.13990495977
5√n 38.25517302615

Divisors of 81931490

1, 2, 5, 10, 1297, 2594, 6317, 6485, 12634, 12970, 31585, 63170, 8193149, 16386298, 40965745, 81931490

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 -81931489
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 81931490 can be divided by 16 positive divisors. The sum of these divisors (counting 81931490) is 1, the average is 0.0625.

Base conversion 81931490

Base System Value
2 Binary 100111000100010110011100010
3 Ternary 12201011112212122
4 Quaternary 10320202303202
5 Quinary 131433301430
6 Senary 12044024242
8 Octal 470426342
10 Decimal 81931490
12 Duodecimal 23532082
16 Hexadecimal 4e22ce2
20 Vigesimal 15c18ea
36 Base36 1cs2qq

Cryptographic Hash Functions

md5 e979d6c590a779ff7ab7600af8936a63
sha1 1906b128d6c220b41f67b89780cf421deb84c1cb
sha256 655efdd54c1aa1b8ff2f94fae7bff97756bd2d79e378780936a9f394f133869f
sha512 d088b1bc37f4c92607ec4cd916921d271834dbb2c8795d0f2857f8f2fc49dac2948ac232d1084ee6bb8b8a582ad335413e820466460d5a92d88225d87d5cc7e2
ripemd-160 3048d62b33a0fd114fe8a551dc038eb4de60be98

81931490 as geometric shapes

Circle

Radius = n
Diameter 163862980
Circumference 514790734.16333
Area 2.1088785944098E+16

Sphere

Radius = n
Volume 2.3037808729213E+24
Surface area 8.4355143776391E+16
Circumference 514790734.16333

Square

Length = n
Perimeter 327725960
Area 6712769053620100
Diagonal 115868624.34344

Cube

Length = n
Surface area 40276614321720600
Volume 5.4998717058898E+23
Space diagonal 141909503.41982

Equilateral Triangle

Length = n
Perimeter 245794470
Area 2.9067142650865E+15
Altitude 70954751.709911

Triangular Pyramid

Length = n
Surface area 2.9067142650865E+15
Volume 6.4816609648179E+22
Height 38622874.781145