81288331 is an odd 8-digits prime number following 81288330
and preceding 81288332 . In scientific notation, it is written as 8.1288331 × 10^7.
The sum of its digits is 34. It has a total of 1 prime factors and 2 positive divisors.
There are 81288330 positive integers (up to 81288331) that are relatively prime to 81288331.
81288331 has 2 divisors, whose sum is 81288332
The reverse of 81288331 is 13388218
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 two hundred eighty-eight thousand three hundred thirty-one
Scientific notation
8.1288331 × 10^7
Engineering notation
8.1288331 × 10^6
Prime Factorization
81288331
Composite number
ω
Distinct Factors
1
Total number of distinct prime factors
Ω
Total Factors
1
Total number of prime factors
rad
Radical
81288331
Product of the distinct prime numbers
The prime factorization of 81288331 is 81288331.
Since it has a total of 1 prime factors.
7 , 2 , 71 , 71 , 150 , 151 , 2395 , 4705 , 40875 , 52700 , 129227 , 455285 , 6928948 , 1444483 , 52934479 , 73945360 , 214722184 , 672342377 , 1564139708 , 1934194913
n×2
162576662
n×3
243864993
n×4
325153324
n×5
406441655
n÷2
40644165.5
n÷3
27096110.333333
n÷3
20322082.75
n÷5
16257666.2
n2
6607792756765561
n3
5.3713644479136E+23
n4
4.3662925116363E+31
n5
3.5492863092872E+39
2 √n
9016.0041592714
3 √n
433.18765234437
4 √n
94.952641665577
5 √n
38.194923221364
2 divisors
τ
Total Divisors
2
Total number of the positive divisors of n
σ
Sum of Divisors
81288332
Sum of all the positive divisors of n
s
Aliquot Sum
1
Sum of the proper positive divisors of n
A
Arithmetic Mean
40644166
Returns the sum of divisors (σ(n )) divided by the total number of divisors (τ(n ))
G
Geometric Mean
9016.0042147284
Returns the nth root of the product of n divisors
H
Harmonic Mean
1.9999999753962
Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 81288331 can be divided by 2 positive divisors.
The sum of these divisors (counting 81288331) is 81288332, the average is 40644166.
Base
System
Value
2
Binary
100110110000101110010001011
3
Ternary
12122221212121221
4
Quaternary
10312011302023
5
Quinary
131302211311
6
Senary
12022142511
8
Octal
466056213
10
Decimal
81288331
12
Duodecimal
23281a37
16
Hexadecimal
4d85c8b
20
Vigesimal
15810gb
36
Base36
1ceah7
md5
05bd58cb2dcf67c54439cb0e9d939a35
sha1
3281bc03799c0b83cdf2e13716bf8ad836ecbff3
sha256
59bd71cd5d55971f83e95d7bd7bc5f644ad762bd282e9dfe8b64ccbd8576047b
sha512
f7ffbce4e20acb78cca9b53e34c74abc40ade2fefc56f63d6f1feb25f3e0d0db0f50a5ff6c5d754b35dd4f3867483d1b176990833f6fad50d0b37c0e1b31a545
ripemd-160
2951c464880a96c9420c7f775c7c5829fcc762f6
Diameter
162576662
Circumference
510749646.98435
Area
2.0758993181099E+16
Volume
2.2499518785758E+24
Surface area
8.3035972724394E+16
Circumference
510749646.98435
Perimeter
325153324
Area
6607792756765561
Diagonal
114959060.16287
Surface area
39646756540593366
Volume
5.3713644479136E+23
Space diagonal
140795519.35448
Perimeter
243864993
Area
2.8612581951509E+15
Altitude
70397759.677238
Surface area
2.8612581951509E+15
Volume
6.3302137089068E+22
Height
38319686.720958