81717721 is an odd 8-digits prime number following 81717720
and preceding 81717722 . In scientific notation, it is written as 8.1717721 × 10^7.
The sum of its digits is 34. It has a total of 1 prime factors and 2 positive divisors.
There are 81717720 positive integers (up to 81717721) that are relatively prime to 81717721.
81717721 has 2 divisors, whose sum is 81717722
The reverse of 81717721 is 12771718
Previous prime number is 1
Is Prime? yes Number parity odd Number length 8 Sum of Digits 34 Digital Root 7
Name
eighty-one million seven hundred seventeen thousand seven hundred twenty-one
Scientific notation
8.1717721 × 10^7
Engineering notation
8.1717721 × 10^6
Prime Factorization
81717721
Composite number
ω Distinct Factors
1 Total number of distinct prime factors
Ω Total Factors
1 Total number of prime factors
rad Radical
81717721 Product of the distinct prime numbers
The prime factorization of 81717721 is 81717721.
Since it has a total of 1 prime factors.
6 , 2 , 48 , 40 , 480 , 246 , 5901 , 1433 , 92157 , 22957 , 234912 , 790070 , 8094464 , 9128606 , 66836014 , 22966928 , 793884479 , 585505123 , 7772513776 , 7260882034
n×2
163435442
n×3
245153163
n×4
326870884
n×5
408588605
n÷2
40858860.5
n÷3
27239240.333333
n÷3
20429430.25
n÷5
16343544.2
n2
6677785925433841
n3
5.4569344715233E+23
n4
4.4592824865922E+31
n5
3.6440240209953E+39
2 √n9039.7854509938
3 √n433.94905678815
4 √n95.077786317277
5 √n38.235189700624
2 divisors
τ Total Divisors
2 Total number of the positive divisors of n
σ Sum of Divisors
81717722 Sum of all the positive divisors of n
s Aliquot Sum
1 Sum of the proper positive divisors of n
A Arithmetic Mean
40858861 Returns the sum of divisors (σ(n )) divided by the total number of divisors (τ(n ))
G Geometric Mean
9039.7855063049 Returns the nth root of the product of n divisors
H Harmonic Mean
1.9999999755255 Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 81717721 can be divided by 2 positive divisors.
The sum of these divisors (counting 81717721) is 81717722, the average is 40858861.
Base
System
Value
2
Binary
100110111101110100111011001
3
Ternary
12200202200122021
4
Quaternary
10313232213121
5
Quinary
131404431341
6
Senary
12035254441
8
Octal
467564731
10
Decimal
81717721
12
Duodecimal
2344a421
16
Hexadecimal
4dee9d9
20
Vigesimal
15aee61
36
Base36
1cnhsp
md5
f587346761033066a1c1dee366016012
sha1
ba66cf6bf03358002be548b0e2e5c21862a6818a
sha256
7af6c660801c44cbd1b2ee36100a8fec2e9dc8df53f4f2e29d955ce4c019eb7d
sha512
39a1a4aba2bba72b6c4ac2ab0ee0f1fabbcc9ceacbe6a802c0fc882ed15023daad4532f5c88de3e2353691a39d8f70100fac67e2517a81c960978f38aa8f4379
ripemd-160
1afbc6265cbc67fde1015dad151c2fb46e974a49
Diameter
163435442
Circumference
513447583.9234
Area
2.0978883205588E+16
Volume
2.2857953662478E+24
Surface area
8.3915532822353E+16
Circumference
513447583.9234
Perimeter
326870884
Area
6677785925433841
Diagonal
115566309.32442
Surface area
40066715552603046
Volume
5.4569344715233E+23
Space diagonal
141539244.65074
Perimeter
245153163
Area
2.8915661262299E+15
Altitude
70769622.325369
Surface area
2.8915661262299E+15
Volume
6.4310589488413E+22
Height
38522103.10814