81724881 (number)

81724881 is an odd 8-digits composite number following 81724880 and preceding 81724882. In scientific notation, it is written as 8.1724881 × 10^7. The sum of its digits is 39. It has a total of 4 prime factors and 16 positive divisors. There are 46330704 positive integers (up to 81724881) that are relatively prime to 81724881.

Interesting facts

Basic properties

Name

Name eighty-one million seven hundred twenty-four thousand eight hundred eighty-one

Notation

Scientific notation 8.1724881 × 10^7
Engineering notation 8.1724881 × 10^6

Prime Factorization of 81724881

Prime Factorization 3 × 7 × 127 × 30643

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 81724881
Product of the distinct prime numbers

The prime factorization of 81724881 is 3 × 7 × 127 × 30643. Since it has a total of 4 prime factors.

Most popular turbo-numbers

9, 8, 79, 3, 273, 369, 7257, 1521, 84918, 25877, 477161, 493383, 1280957, 2238032, 30365122, 50755001, 102062763, 382408971, 6341895856, 8028397176

Basic calculations (n = 81724881)

Multiplication

n×y
n×2 163449762
n×3 245174643
n×4 326899524
n×5 408624405

Division

n÷y
n÷2 40862440.5
n÷3 27241627
n÷3 20431220.25
n÷5 16344976.2

Exponentiation

ny
n2 6678956174464161
n3 5.458368985623E+23
n4 4.4608455580413E+31
n5 3.645620723903E+39

Nth Root

y√n
2√n 9040.1814694175
3√n 433.96173043457
4√n 95.07986889672
5√n 38.235859700621

Divisors of 81724881

1, 3, 7, 21, 127, 381, 889, 2667, 30643, 91929, 214501, 643503, 3891661, 11674983, 27241627, 81724881

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 -81724880
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 81724881 can be divided by 16 positive divisors. The sum of these divisors (counting 81724881) is 1, the average is 0.0625.

Base conversion 81724881

Base System Value
2 Binary 100110111110000010111010001
3 Ternary 12200210001110110
4 Quaternary 10313300113101
5 Quinary 131410144011
6 Senary 12035351533
8 Octal 467602721
10 Decimal 81724881
12 Duodecimal 234525a9
16 Hexadecimal 4df05d1
20 Vigesimal 15afc41
36 Base36 1cnnbl

Cryptographic Hash Functions

md5 72bff21f03686dc9cc9511884e6c2f16
sha1 bb9146eead10247ca882fed75b37e1278ca3d37b
sha256 a885ec6ba12b2cdd48f7fdb857eca1aa958fcdfe521994b7da2e46f818567c0a
sha512 3a6a2a884d55ca4d5f36164c5ce66920e2392d673452720d50c3e0cc9e709904b9e235f0bd2eca2d22505f3cd503c11546209fbbc3f4e461acb3ce77629d7c6f
ripemd-160 77d6226579ed22cb36e3f0e0a448f0de362c4502

81724881 as geometric shapes

Circle

Radius = n
Diameter 163449762
Circumference 513492571.5302
Area 2.0982559651345E+16

Sphere

Radius = n
Volume 2.2863962541087E+24
Surface area 8.3930238605379E+16
Circumference 513492571.5302

Square

Length = n
Perimeter 326899524
Area 6678956174464161
Diagonal 115576435.09353

Cube

Length = n
Surface area 40073737046784966
Volume 5.458368985623E+23
Space diagonal 141551646.13452

Equilateral Triangle

Length = n
Perimeter 245174643
Area 2.8920728589244E+15
Altitude 70775823.06726

Triangular Pyramid

Length = n
Surface area 2.8920728589244E+15
Volume 6.4327495399206E+22
Height 38525478.364509