81271491 (number)

81271491 is an odd 8-digits composite number following 81271490 and preceding 81271492. In scientific notation, it is written as 8.1271491 × 10^7. The sum of its digits is 33. It has a total of 5 prime factors and 32 positive divisors. There are 44543520 positive integers (up to 81271491) that are relatively prime to 81271491.

Interesting facts

Basic properties

Name

Name eighty-one million two hundred seventy-one thousand four hundred ninety-one

Notation

Scientific notation 8.1271491 × 10^7
Engineering notation 8.1271491 × 10^6

Prime Factorization of 81271491

Prime Factorization 3 × 7 × 31 × 127 × 983

Composite number
ω Distinct Factors 5
Total number of distinct prime factors
Ω Total Factors 5
Total number of prime factors
rad Radical 81271491
Product of the distinct prime numbers

The prime factorization of 81271491 is 3 × 7 × 31 × 127 × 983. Since it has a total of 5 prime factors.

Most popular turbo-numbers

9, 4, 74, 78, 138, 42, 5248, 3092, 56267, 20718, 811349, 469542, 2747102, 8051637, 39442201, 42936511, 123534131, 520428098, 6234545603, 7344678599

Basic calculations (n = 81271491)

Multiplication

n×y
n×2 162542982
n×3 243814473
n×4 325085964
n×5 406357455

Division

n÷y
n÷2 40635745.5
n÷3 27090497
n÷3 20317872.75
n÷5 16254298.2

Exponentiation

ny
n2 6605055249363081
n3 5.3680268825311E+23
n4 4.3626754847139E+31
n5 3.5456114139184E+39

Nth Root

y√n
2√n 9015.0702160327
3√n 433.1577366776
4√n 94.947723595844
5√n 38.193340569082

Divisors of 81271491

1, 3, 7, 21, 31, 93, 127, 217, 381, 651, 889, 983, 2667, 2949, 3937, 6881, 11811, 20643, 27559, 30473, 82677, 91419, 124841, 213311, 374523, 639933, 873887, 2621661, 3870071, 11610213, 27090497, 81271491

32 divisors

τ Total Divisors 32
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81271490
Sum of the proper positive divisors of n
A Arithmetic Mean 0.03125
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 32
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81271491 can be divided by 32 positive divisors. The sum of these divisors (counting 81271491) is 1, the average is 0.03125.

Base conversion 81271491

Base System Value
2 Binary 100110110000001101011000011
3 Ternary 12122221000112020
4 Quaternary 10312001223003
5 Quinary 131301141431
6 Senary 12021532523
8 Octal 466015303
10 Decimal 81271491
12 Duodecimal 23274143
16 Hexadecimal 4d81ac3
20 Vigesimal 157iieb
36 Base36 1cdxhf

Cryptographic Hash Functions

md5 4896762b75be750f7567124ab4cc7899
sha1 a310599db19858e58dd1a2e1bee965d0de48e96f
sha256 ef2b259c8e9ff2eac00d6dcfaf7a4fc694743aac0f36c6148cda43232e0c7dc1
sha512 cb9bd68f8474c12042ca70639055085b07c58388290e6adff95be1a7c044def0ebb55b1a6faaf040f89d0909d5883e6d4f87342ce43e06a31dda0b74de1dd0a5
ripemd-160 819835925bb7746158e354f7179672f8d340df3f

81271491 as geometric shapes

Circle

Radius = n
Diameter 162542982
Circumference 510643838.14378
Area 2.0750393047954E+16

Sphere

Radius = n
Volume 2.2485538424576E+24
Surface area 8.3001572191815E+16
Circumference 510643838.14378

Square

Length = n
Perimeter 325085964
Area 6605055249363081
Diagonal 114935244.80648

Cube

Length = n
Surface area 39630331496178486
Volume 5.3680268825311E+23
Space diagonal 140766351.61888

Equilateral Triangle

Length = n
Perimeter 243814473
Area 2.8600728196741E+15
Altitude 70383175.809438

Triangular Pyramid

Length = n
Surface area 2.8600728196741E+15
Volume 6.3262803503824E+22
Height 38311748.268828