81121885 (number)

81121885 is an odd 8-digits composite number following 81121884 and preceding 81121886. In scientific notation, it is written as 8.1121885 × 10^7. The sum of its digits is 34. It has a total of 5 prime factors and 32 positive divisors. There are 57335040 positive integers (up to 81121885) that are relatively prime to 81121885.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 8.1121885 × 10^7
Engineering notation 8.1121885 × 10^6

Prime Factorization of 81121885

Prime Factorization 5 × 13 × 31 × 127 × 317

Composite number
ω Distinct Factors 5
Total number of distinct prime factors
Ω Total Factors 5
Total number of prime factors
rad Radical 81121885
Product of the distinct prime numbers

The prime factorization of 81121885 is 5 × 13 × 31 × 127 × 317. Since it has a total of 5 prime factors.

Most popular turbo-numbers

1, 2, 65, 42, 674, 384, 540, 9400, 86453, 22306, 884940, 986756, 4079113, 3528298, 281987, 56057426, 989960740, 722267269, 7032272828, 1410809293

Basic calculations (n = 81121885)

Multiplication

n×y
n×2 162243770
n×3 243365655
n×4 324487540
n×5 405609425

Division

n÷y
n÷2 40560942.5
n÷3 27040628.333333
n÷3 20280471.25
n÷5 16224377

Exponentiation

ny
n2 6580760225953225
n3 5.3384367426235E+23
n4 4.3306405151488E+31
n5 3.5130972184624E+39

Nth Root

y√n
2√n 9006.7688434865
3√n 432.89178527704
4√n 94.90399803742
5√n 38.179268808296

Divisors of 81121885

1, 5, 13, 31, 65, 127, 155, 317, 403, 635, 1585, 1651, 2015, 3937, 4121, 8255, 9827, 19685, 20605, 40259, 49135, 51181, 127751, 201295, 255905, 523367, 638755, 1248029, 2616835, 6240145, 16224377, 81121885

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 -81121884
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 81121885 can be divided by 32 positive divisors. The sum of these divisors (counting 81121885) is 1, the average is 0.03125.

Base conversion 81121885

Base System Value
2 Binary 100110101011101001001011101
3 Ternary 12122122102022021
4 Quaternary 10311131021131
5 Quinary 131231400020
6 Senary 12014420141
8 Octal 465351135
10 Decimal 81121885
12 Duodecimal 23201651
16 Hexadecimal 4d5d25d
20 Vigesimal 15704e5
36 Base36 1caq1p

Cryptographic Hash Functions

md5 0c0f29c0f11b61c2534fb0c46ff983da
sha1 2648794a02bc4dbc45fc46deb5615c6b190324f7
sha256 255cffe6fba0771550892b1c7588f0f1a1ff64de60aae504a78cb33c34c370fd
sha512 54efff9219d2ccfabe03498ec66be70754a6d758eb549878b4b42af059d23dbffd10a16ba469d57d73edc4724b14b0f94d5583009a043088040f02a3df992874
ripemd-160 3879100f5186c9acfb1ff1cdf8dfe4ee01499289

81121885 as geometric shapes

Circle

Radius = n
Diameter 162243770
Circumference 509703835.92271
Area 2.0674067980891E+16

Sphere

Radius = n
Volume 2.2361591536373E+24
Surface area 8.2696271923562E+16
Circumference 509703835.92271

Square

Length = n
Perimeter 324487540
Area 6580760225953225
Diagonal 114723669.97227

Cube

Length = n
Surface area 39484561355719350
Volume 5.3384367426235E+23
Space diagonal 140507226.42576

Equilateral Triangle

Length = n
Perimeter 243365655
Area 2.8495527659449E+15
Altitude 70253613.21288

Triangular Pyramid

Length = n
Surface area 2.8495527659449E+15
Volume 6.2914080360742E+22
Height 38241223.32409