81211689 (number)

81211689 is an odd 8-digits composite number following 81211688 and preceding 81211690. In scientific notation, it is written as 8.1211689 × 10^7. The sum of its digits is 36. It has a total of 5 prime factors and 32 positive divisors. There are 47177856 positive integers (up to 81211689) that are relatively prime to 81211689.

Interesting facts

Basic properties

Name

Name eighty-one million two hundred eleven thousand six hundred eighty-nine

Notation

Scientific notation 8.1211689 × 10^7
Engineering notation 8.1211689 × 10^6

Prime Factorization of 81211689

Prime Factorization 9 × 13 × 23 × 103 × 293

Composite number
ω Distinct Factors 5
Total number of distinct prime factors
Ω Total Factors 5
Total number of prime factors
rad Radical 81211689
Product of the distinct prime numbers

The prime factorization of 81211689 is 9 × 13 × 23 × 103 × 293. Since it has a total of 5 prime factors.

Most popular turbo-numbers

9, 5, 11, 31, 948, 715, 8553, 5049, 97550, 19526, 311332, 596151, 4250831, 7578285, 34865836, 1713986, 17508821, 741862883, 9898476950, 8060928369

Basic calculations (n = 81211689)

Multiplication

n×y
n×2 162423378
n×3 243635067
n×4 324846756
n×5 406058445

Division

n÷y
n÷2 40605844.5
n÷3 27070563
n÷3 20302922.25
n÷5 16242337.8

Exponentiation

ny
n2 6595338430232721
n3 5.3561857344581E+23
n4 4.3498489009305E+31
n5 3.5325857613936E+39

Nth Root

y√n
2√n 9011.7528261709
3√n 433.05146712427
4√n 94.93025242867
5√n 38.187718152938

Divisors of 81211689

1, 9, 13, 23, 103, 117, 207, 293, 299, 927, 1339, 2369, 2637, 2691, 3809, 6739, 12051, 21321, 30179, 30797, 34281, 60651, 87607, 271611, 277173, 392327, 694117, 788463, 3530943, 6247053, 9023521, 81211689

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 -81211688
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 81211689 can be divided by 32 positive divisors. The sum of these divisors (counting 81211689) is 1, the average is 0.03125.

Base conversion 81211689

Base System Value
2 Binary 100110101110011000100101001
3 Ternary 12122210222111100
4 Quaternary 10311303010221
5 Quinary 131242233224
6 Senary 12020352013
8 Octal 465630451
10 Decimal 81211689
12 Duodecimal 23245609
16 Hexadecimal 4d73129
20 Vigesimal 157b949
36 Base36 1ccnc9

Cryptographic Hash Functions

md5 723bd9b7d1fabedaab834617fd035786
sha1 d177cbec03e4a3128a03f8338e42123f5d7e4c36
sha256 7633ce6d447bd24e1c8e2fa5aedd5cdeabe32a1370b54086aa98060927e9255a
sha512 1d092fa259088c954a1c08e7fe42ea587649df4b835e6969747dc1de66011f62bc1b217c1702d1e058c21e3afbc84eb3c008d6b84c135c8d3401e72290a18707
ripemd-160 e4369009dbcd1c44e9ea00838b2be5e2c3f038b9

81211689 as geometric shapes

Circle

Radius = n
Diameter 162423378
Circumference 510268091.09604
Area 2.0719866760358E+16

Sphere

Radius = n
Volume 2.2435938339515E+24
Surface area 8.287946704143E+16
Circumference 510268091.09604

Square

Length = n
Perimeter 324846756
Area 6595338430232721
Diagonal 114850672.00703

Cube

Length = n
Surface area 39572030581396326
Volume 5.3561857344581E+23
Space diagonal 140662771.51648

Equilateral Triangle

Length = n
Perimeter 243635067
Area 2.8558653135687E+15
Altitude 70331385.758241

Triangular Pyramid

Length = n
Surface area 2.8558653135687E+15
Volume 6.3123254235499E+22
Height 38283557.335675