81721806 (number)

81721806 is an even 8-digits composite number following 81721805 and preceding 81721807. In scientific notation, it is written as 8.1721806 × 10^7. The sum of its digits is 33. It has a total of 5 prime factors and 32 positive divisors. There are 25988160 positive integers (up to 81721806) that are relatively prime to 81721806.

Interesting facts

Basic properties

Name

Name eighty-one million seven hundred twenty-one thousand eight hundred six

Notation

Scientific notation 8.1721806 × 10^7
Engineering notation 8.1721806 × 10^6

Prime Factorization of 81721806

Prime Factorization 2 × 3 × 23 × 857 × 691

Composite number
ω Distinct Factors 5
Total number of distinct prime factors
Ω Total Factors 5
Total number of prime factors
rad Radical 81721806
Product of the distinct prime numbers

The prime factorization of 81721806 is 2 × 3 × 23 × 857 × 691. Since it has a total of 5 prime factors.

Most popular turbo-numbers

2, 7, 82, 92, 466, 152, 2002, 4453, 38622, 60959, 359296, 872693, 366556, 3110780, 48463337, 29003272, 355961989, 825099877, 921347080, 5961353750

Basic calculations (n = 81721806)

Multiplication

n×y
n×2 163443612
n×3 245165418
n×4 326887224
n×5 408609030

Division

n÷y
n÷2 40860903
n÷3 27240602
n÷3 20430451.5
n÷5 16344361.2

Exponentiation

ny
n2 6678453575901636
n3 5.4577528750984E+23
n4 4.4601742165473E+31
n5 3.6449349205088E+39

Nth Root

y√n
2√n 9040.0113937981
3√n 433.95628758354
4√n 95.078974509605
5√n 38.235571961962

Divisors of 81721806

1, 2, 3, 6, 23, 46, 69, 138, 691, 857, 1382, 1714, 2073, 2571, 4146, 5142, 15893, 19711, 31786, 39422, 47679, 59133, 95358, 118266, 592187, 1184374, 1776561, 3553122, 13620301, 27240602, 40860903, 81721806

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 -81721805
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 81721806 can be divided by 32 positive divisors. The sum of these divisors (counting 81721806) is 1, the average is 0.03125.

Base conversion 81721806

Base System Value
2 Binary 100110111101111100111001110
3 Ternary 12200202220020120
4 Quaternary 10313233213032
5 Quinary 131410044211
6 Senary 12035325410
8 Octal 467574716
10 Decimal 81721806
12 Duodecimal 23450866
16 Hexadecimal 4def9ce
20 Vigesimal 15af4a6
36 Base36 1cnky6

Cryptographic Hash Functions

md5 a60e78c960c193b44367e5929e6e6d4b
sha1 c5bfe4cab2c7f43c6470f3cf1cdbc034ba287c4b
sha256 6ed3b2a1b393424cc081bfd3dac184cc487ce4ce6ca9ae00cf0e61147b4680dc
sha512 790dc751f78c868f6cfd31b17d4d3b25e1b5d42d24f258f7cebfbe2d7675a98124fcb0611b8156d83e4a3067f5a5672bf48b34e4c08f89ceae6af8264c6c8e82
ripemd-160 14e3197b8af04e69fbae6e52ac4d6a7e004a9df4

81721806 as geometric shapes

Circle

Radius = n
Diameter 163443612
Circumference 513473250.73538
Area 2.0980980691393E+16

Sphere

Radius = n
Volume 2.2861381783357E+24
Surface area 8.3923922765572E+16
Circumference 513473250.73538

Square

Length = n
Perimeter 326887224
Area 6678453575901636
Diagonal 115572086.38682

Cube

Length = n
Surface area 40070721455409816
Volume 5.4577528750984E+23
Space diagonal 141546320.07829

Equilateral Triangle

Length = n
Perimeter 245165418
Area 2.8918552273629E+15
Altitude 70773160.039144

Triangular Pyramid

Length = n
Surface area 2.8918552273629E+15
Volume 6.4320234467041E+22
Height 38524028.795608