81968281 is an odd 8-digits prime number following 81968280
and preceding 81968282 . In scientific notation, it is written as 8.1968281 × 10^7.
The sum of its digits is 43. It has a total of 1 prime factors and 2 positive divisors.
There are 81968280 positive integers (up to 81968281) that are relatively prime to 81968281.
81968281 has 2 divisors, whose sum is 81968282
The reverse of 81968281 is 18286918
Previous prime number is 1
Is Prime? yes Number parity odd Number length 8 Sum of Digits 43 Digital Root 7
Name
eighty-one million nine hundred sixty-eight thousand two hundred eighty-one
Scientific notation
8.1968281 × 10^7
Engineering notation
8.1968281 × 10^6
Prime Factorization
81968281
Composite number
ω Distinct Factors
1 Total number of distinct prime factors
Ω Total Factors
1 Total number of prime factors
rad Radical
81968281 Product of the distinct prime numbers
The prime factorization of 81968281 is 81968281.
Since it has a total of 1 prime factors.
3 , 5 , 65 , 11 , 738 , 198 , 5387 , 8772 , 52619 , 63509 , 277497 , 335674 , 2704187 , 7033760 , 92240203 , 680788 , 446826217 , 521080519 , 2429672825 , 643293864
n×2
163936562
n×3
245904843
n×4
327873124
n×5
409841405
n÷2
40984140.5
n÷3
27322760.333333
n÷3
20492070.25
n÷5
16393656.2
n2
6718799090094961
n3
5.5072841179945E+23
n4
4.5142261213061E+31
n5
3.7002335520876E+39
2 √n9053.6335799501
3 √n434.39212403206
4 √n95.150583707879
5 √n38.25860807496
2 divisors
τ Total Divisors
2 Total number of the positive divisors of n
σ Sum of Divisors
81968282 Sum of all the positive divisors of n
s Aliquot Sum
1 Sum of the proper positive divisors of n
A Arithmetic Mean
40984141 Returns the sum of divisors (σ(n )) divided by the total number of divisors (τ(n ))
G Geometric Mean
9053.6336351765 Returns the nth root of the product of n divisors
H Harmonic Mean
1.9999999756003 Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 81968281 can be divided by 2 positive divisors.
The sum of these divisors (counting 81968281) is 81968282, the average is 40984141.
Base
System
Value
2
Binary
100111000101011110010011001
3
Ternary
12201020102100021
4
Quaternary
10320223302121
5
Quinary
131440441111
6
Senary
12044510441
8
Octal
470536231
10
Decimal
81968281
12
Duodecimal
2354b421
16
Hexadecimal
4e2bc99
20
Vigesimal
15c60e1
36
Base36
1csv4p
md5
4374f25925d688af9dc5c6aec1ae07bd
sha1
e9b343fbd3e78d8a107f76ff31fcbcedc4188927
sha256
2f3b61a3efefc4bac566a35ec9f117f1da9d7aa9edd0fd06d6110b7109f3d3c5
sha512
f6ec3f5c61707756ab7fc6bbb405e356ce07c4b8a6daad2220a03dd641b9d47406fd6138dcce7251a7f54e59f4b1a59c00e0242427445b0ceedb5b33c27e1f26
ripemd-160
eb591c8ba54cb435cf65e187e8ccde488a473451
Diameter
163936562
Circumference
515021898.83397
Area
2.1107729862388E+16
Volume
2.3068857768431E+24
Surface area
8.4430919449552E+16
Circumference
515021898.83397
Perimeter
327873124
Area
6718799090094961
Diagonal
115920654.67461
Surface area
40312794540569766
Volume
5.5072841179945E+23
Space diagonal
141973227.30108
Perimeter
245904843
Area
2.909325347473E+15
Altitude
70986613.650541
Surface area
2.909325347473E+15
Volume
6.4903965762581E+22
Height
38640218.22487