81121011 is an odd 8-digits composite number following 81121010
and preceding 81121012 . In scientific notation, it is written as 8.1121011 × 10^7.
The sum of its digits is 15. It has a total of 2 prime factors and 4 positive divisors.
There are 54080672 positive integers (up to 81121011) that are relatively prime to 81121011.
81121011 has 4 divisors, whose sum is 108161352
The reverse of 81121011 is 11012118
Previous prime number is 3
Is Prime? no
Number parity odd
Number length 8
Sum of Digits 15
Digital Root 6
Name
eighty-one million one hundred twenty-one thousand eleven
Scientific notation
8.1121011 × 10^7
Engineering notation
8.1121011 × 10^6
Prime Factorization
3 × 27040337
Composite number
ω
Distinct Factors
2
Total number of distinct prime factors
Ω
Total Factors
2
Total number of prime factors
rad
Radical
81121011
Product of the distinct prime numbers
The prime factorization of 81121011 is 3 × 27040337.
Since it has a total of 2 prime factors.
10 , 3 , 13 , 51 , 748 , 22 , 4881 , 2908 , 34652 , 1143 , 515544 , 706785 , 4493743 , 3970504 , 13307057 , 74825440 , 37724735 , 20019627 , 7623079969 , 4813402609
n×2
162242022
n×3
243363033
n×4
324484044
n×5
405605055
n÷2
40560505.5
n÷3
27040337
n÷3
20280252.75
n÷5
16224202.2
n2
6580618425662121
n3
5.3382641969494E+23
n4
4.3304538864164E+31
n5
3.5129079735498E+39
2 √n
9006.7203242912
3 √n
432.89023062555
4 √n
94.903742414571
5 √n
38.179186539929
4 divisors
τ
Total Divisors
4
Total number of the positive divisors of n
σ
Sum of Divisors
1
Sum of all the positive divisors of n
s
Aliquot Sum
-81121010
Sum of the proper positive divisors of n
A
Arithmetic Mean
0.25
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
4
Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 81121011 can be divided by 4 positive divisors.
The sum of these divisors (counting 81121011) is 1, the average is 0.25.
Base
System
Value
2
Binary
100110101011100111011110011
3
Ternary
12122122101002220
4
Quaternary
10311130323303
5
Quinary
131231333021
6
Senary
12014412123
8
Octal
465347363
10
Decimal
81121011
12
Duodecimal
23201043
16
Hexadecimal
4d5cef3
20
Vigesimal
15702ab
36
Base36
1capdf
md5
8bb343015f6475b112e4964b686b4692
sha1
477f2012e49879c76129eaece31c479a5882df76
sha256
1596e859886101f3b4d57145747e4e51576b7a67455d04b4898d59a65399c222
sha512
230ce48e19cd7cb67a58bf75bbf4873c3b78e4026ed72868cc44c8c366ac65fd24ad0f761330c8a9ebfee5393b5f9993455361f9f579cc248a960ef7b37e9c38
ripemd-160
58fff00f4e7a88ceb55cac0f541090eb13d7f930
Diameter
162242022
Circumference
509698344.41875
Area
2.0673622502138E+16
Volume
2.2360868778744E+24
Surface area
8.2694490008551E+16
Circumference
509698344.41875
Perimeter
324484044
Area
6580618425662121
Diagonal
114722433.94962
Surface area
39483710553972726
Volume
5.3382641969494E+23
Space diagonal
140505712.61335
Perimeter
243363033
Area
2.8494913646177E+15
Altitude
70252856.306677
Surface area
2.8494913646177E+15
Volume
6.2912046890471E+22
Height
38240811.316539