81091520 (number)

81091520 is an even 8-digits composite number following 81091519 and preceding 81091521. In scientific notation, it is written as 8.1091520 × 10^7. The sum of its digits is 26. It has a total of 9 prime factors and 56 positive divisors. There are 32256000 positive integers (up to 81091520) that are relatively prime to 81091520.

Interesting facts

Basic properties

Name

Name eighty-one million ninety-one thousand five hundred twenty

Notation

Scientific notation 8.1091520 × 10^7
Engineering notation 8.1091520 × 10^6

Prime Factorization of 81091520

Prime Factorization 2 × 2 × 2 × 2 × 2 × 2 × 5 × 211 × 1201

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 9
Total number of prime factors
rad Radical 2534110
Product of the distinct prime numbers

The prime factorization of 81091520 is 2 × 2 × 2 × 2 × 2 × 2 × 5 × 211 × 1201. Since it has a total of 9 prime factors.

Most popular turbo-numbers

2, 8, 89, 73, 308, 949, 690, 769, 43614, 29368, 498375, 517182, 5539217, 1327, 53816896, 32616117, 596447518, 780081520, 5673766135, 2357398703

Basic calculations (n = 81091520)

Multiplication

n×y
n×2 162183040
n×3 243274560
n×4 324366080
n×5 405457600

Division

n÷y
n÷2 40545760
n÷3 27030506.666667
n÷3 20272880
n÷5 16218304

Exponentiation

ny
n2 6575834615910400
n3 5.3324442427279E+23
n4 4.3241600895805E+31
n5 3.5065271438742E+39

Nth Root

y√n
2√n 9005.0830090566
3√n 432.83776615308
4√n 94.895115833517
5√n 38.176410178679

Divisors of 81091520

1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 211, 320, 422, 844, 1055, 1201, 1688, 2110, 2402, 3376, 4220, 4804, 6005, 6752, 8440, 9608, 12010, 13504, 16880, 19216, 24020, 33760, 38432, 48040, 67520, 76864, 96080, 192160, 253411, 384320, 506822, 1013644, 1267055, 2027288, 2534110, 4054576, 5068220, 8109152, 10136440, 16218304, 20272880, 40545760, 81091520

56 divisors

τ Total Divisors 56
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81091519
Sum of the proper positive divisors of n
A Arithmetic Mean 0.017857142857143
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 56
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81091520 can be divided by 56 positive divisors. The sum of these divisors (counting 81091520) is 1, the average is 0.017857142857143.

Base conversion 81091520

Base System Value
2 Binary 100110101010101101111000000
3 Ternary 12122120212122122
4 Quaternary 10311111233000
5 Quinary 131224412040
6 Senary 12014023412
8 Octal 465255700
10 Decimal 81091520
12 Duodecimal 231a7b68
16 Hexadecimal 4d55bc0
20 Vigesimal 156g8g0
36 Base36 1ca2m8

Cryptographic Hash Functions

md5 5b0870c9ee3d97516be6cf17f94f121e
sha1 a553732140b467b14019233572ec307fff9f5e64
sha256 a05fc280d079ace19f150e88f887c4fa53fb3485154828b3c8f298f02bbcf8dc
sha512 72ee61d207ce1e5e8e1f2afa7ae5459610c4b7191a777bb94b2a0ab72d15f4c14ad9f548c4b9ff26238ff84095e588ec05ef275edb930a7e4cedfb817c1fd43a
ripemd-160 0df24e2f734f9694c2d1f9b557bd8f1928f5f3c1

81091520 as geometric shapes

Circle

Radius = n
Diameter 162183040
Circumference 509513047.00086
Area 2.0658593720566E+16

Sphere

Radius = n
Volume 2.2336490211508E+24
Surface area 8.2634374882262E+16
Circumference 509513047.00086

Square

Length = n
Perimeter 324366080
Area 6575834615910400
Diagonal 114680727.37745

Cube

Length = n
Surface area 39455007695462400
Volume 5.3324442427279E+23
Space diagonal 140454632.70299

Equilateral Triangle

Length = n
Perimeter 243274560
Area 2.8474199142317E+15
Altitude 70227316.351494

Triangular Pyramid

Length = n
Surface area 2.8474199142317E+15
Volume 6.2843458072201E+22
Height 38226909.125816