81128215 (number)

81128215 is an odd 8-digits composite number following 81128214 and preceding 81128216. In scientific notation, it is written as 8.1128215 × 10^7. The sum of its digits is 28. It has a total of 4 prime factors and 16 positive divisors. There are 55550880 positive integers (up to 81128215) that are relatively prime to 81128215.

Interesting facts

Basic properties

Name

Name eighty-one million one hundred twenty-eight thousand two hundred fifteen

Notation

Scientific notation 8.1128215 × 10^7
Engineering notation 8.1128215 × 10^6

Prime Factorization of 81128215

Prime Factorization 5 × 7 × 991 × 2339

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 81128215
Product of the distinct prime numbers

The prime factorization of 81128215 is 5 × 7 × 991 × 2339. Since it has a total of 4 prime factors.

Most popular turbo-numbers

8, 6, 12, 65, 762, 8, 5227, 4447, 30539, 556, 996915, 99466, 6193564, 9534227, 85639295, 90579654, 320950900, 47857790, 8874211663, 6911611042

Basic calculations (n = 81128215)

Multiplication

n×y
n×2 162256430
n×3 243384645
n×4 324512860
n×5 405641075

Division

n÷y
n÷2 40564107.5
n÷3 27042738.333333
n÷3 20282053.75
n÷5 16225643

Exponentiation

ny
n2 6581787269086225
n3 5.3396865265069E+23
n4 4.3319923655506E+31
n5 3.5144680801074E+39

Nth Root

y√n
2√n 9007.1202390109
3√n 432.90304460503
4√n 94.905849340338
5√n 38.179864620951

Divisors of 81128215

1, 5, 7, 35, 991, 2339, 4955, 6937, 11695, 16373, 34685, 81865, 2317949, 11589745, 16225643, 81128215

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 -81128214
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 81128215 can be divided by 16 positive divisors. The sum of these divisors (counting 81128215) is 1, the average is 0.0625.

Base conversion 81128215

Base System Value
2 Binary 100110101011110101100010111
3 Ternary 12122122201222201
4 Quaternary 10311132230113
5 Quinary 131232100330
6 Senary 12014505331
8 Octal 465365427
10 Decimal 81128215
12 Duodecimal 23205247
16 Hexadecimal 4d5eb17
20 Vigesimal 15710af
36 Base36 1cauxj

Cryptographic Hash Functions

md5 45fca990b7c8cba8c5408961825e4d9d
sha1 064e52ca239824981cd127c1262ac5129263b879
sha256 07d3df3cc0dfa4694ede6c85c074b203b071d762c8457858e42a17ed360df64d
sha512 99ce2d8f93418e008d0d0e4b42878b58bb79d88a189ee6e0dcbdf9a9c33b74a13508c2bc0a6ebdd533746932389cf9aeb3d80ec0b6d8820691e5d051ddce3bee
ripemd-160 409f601f9c2149c147a237e4f5bb58287cb9fb57

81128215 as geometric shapes

Circle

Radius = n
Diameter 162256430
Circumference 509743608.48571
Area 2.0677294532052E+16

Sphere

Radius = n
Volume 2.2366826618862E+24
Surface area 8.2709178128208E+16
Circumference 509743608.48571

Square

Length = n
Perimeter 324512860
Area 6581787269086225
Diagonal 114732621.94412

Cube

Length = n
Surface area 39490723614517350
Volume 5.3396865265069E+23
Space diagonal 140518190.30737

Equilateral Triangle

Length = n
Perimeter 243384645
Area 2.8499974886668E+15
Altitude 70259095.153686

Triangular Pyramid

Length = n
Surface area 2.8499974886668E+15
Volume 6.2928809205058E+22
Height 38244207.314707