81775981 (number)

81775981 is an odd 8-digits composite number following 81775980 and preceding 81775982. In scientific notation, it is written as 8.1775981 × 10^7. The sum of its digits is 46. It has a total of 4 prime factors and 16 positive divisors. There are 63685440 positive integers (up to 81775981) that are relatively prime to 81775981.

Interesting facts

Basic properties

Name

Name eighty-one million seven hundred seventy-five thousand nine hundred eighty-one

Notation

Scientific notation 8.1775981 × 10^7
Engineering notation 8.1775981 × 10^6

Prime Factorization of 81775981

Prime Factorization 7 × 43 × 1501 × 181

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 81775981
Product of the distinct prime numbers

The prime factorization of 81775981 is 7 × 43 × 1501 × 181. Since it has a total of 4 prime factors.

Most popular turbo-numbers

4, 3, 46, 48, 799, 912, 7974, 5793, 24022, 99163, 262153, 142922, 1443358, 2354724, 32838639, 29554662, 647301660, 792446968, 6636253690, 2201910077

Basic calculations (n = 81775981)

Multiplication

n×y
n×2 163551962
n×3 245327943
n×4 327103924
n×5 408879905

Division

n÷y
n÷2 40887990.5
n÷3 27258660.333333
n÷3 20443995.25
n÷5 16355196.2

Exponentiation

ny
n2 6687311068512361
n3 5.4686142287976E+23
n4 4.4720129327048E+31
n5 3.6570324461662E+39

Nth Root

y√n
2√n 9043.00729846
3√n 434.05215913424
4√n 95.094728026636
5√n 38.240640041484

Divisors of 81775981

1, 7, 43, 181, 301, 1267, 1501, 7783, 10507, 54481, 64543, 271681, 451801, 1901767, 11682283, 81775981

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 -81775980
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 81775981 can be divided by 16 positive divisors. The sum of these divisors (counting 81775981) is 1, the average is 0.0625.

Base conversion 81775981

Base System Value
2 Binary 100110111111100110101101101
3 Ternary 12200212122120001
4 Quaternary 10313330311231
5 Quinary 131413312411
6 Senary 12040424301
8 Octal 467746555
10 Decimal 81775981
12 Duodecimal 23478091
16 Hexadecimal 4dfcd6d
20 Vigesimal 15b1jj1
36 Base36 1coqr1

Cryptographic Hash Functions

md5 e290244087d743974d917697d472c398
sha1 e2262c7aaa9fa3aa3e333600d8b66db6f96e079e
sha256 8ef1d159affaac8dd4cc81becb96050543b2319c570344d729ebe36d0ecf0b9b
sha512 536e6ac7be0e096c65a197a349f4f0bde50c21264c5a8e5c4915de744d740cc941c6b73b9f4720fd086eba6525304c4cb8f691fbc933d00ee0ef9a5592b42914
ripemd-160 39e043f8ea0a51727672506d2486c77efb071cb7

81775981 as geometric shapes

Circle

Radius = n
Diameter 163551962
Circumference 513813642.2994
Area 2.1008807325108E+16

Sphere

Radius = n
Volume 2.2906877715343E+24
Surface area 8.4035229300433E+16
Circumference 513813642.2994

Square

Length = n
Perimeter 327103924
Area 6687311068512361
Diagonal 115648701.40656

Cube

Length = n
Surface area 40123866411074166
Volume 5.4686142287976E+23
Space diagonal 141640153.93079

Equilateral Triangle

Length = n
Perimeter 245327943
Area 2.8956906341703E+15
Altitude 70820076.965394

Triangular Pyramid

Length = n
Surface area 2.8956906341703E+15
Volume 6.4448236747933E+22
Height 38549567.135522