81121013 is an odd 8-digits composite number following 81121012
and preceding 81121014 . In scientific notation, it is written as 8.1121013 × 10^7.
The sum of its digits is 17. It has a total of 3 prime factors and 8 positive divisors.
There are 75215520 positive integers (up to 81121013) that are relatively prime to 81121013.
81121013 has 8 divisors, whose sum is 87208320
The reverse of 81121013 is 31012118
Previous prime number is 19
Is Prime? no
Number parity odd
Number length 8
Sum of Digits 17
Digital Root 8
Name
eighty-one million one hundred twenty-one thousand thirteen
Scientific notation
8.1121013 × 10^7
Engineering notation
8.1121013 × 10^6
Prime Factorization
47 × 19 × 90841
Composite number
ω
Distinct Factors
3
Total number of distinct prime factors
Ω
Total Factors
3
Total number of prime factors
rad
Radical
81121013
Product of the distinct prime numbers
The prime factorization of 81121013 is 47 × 19 × 90841.
Since it has a total of 3 prime factors.
6 , 7 , 67 , 44 , 603 , 356 , 8352 , 6903 , 43607 , 9576 , 764802 , 635283 , 2853886 , 4142219 , 76335687 , 99675169 , 569706016 , 408237933 , 5898979999 , 6180968032
n×2
162242026
n×3
243363039
n×4
324484052
n×5
405605065
n÷2
40560506.5
n÷3
27040337.666667
n÷3
20280253.25
n÷5
16224202.6
n2
6580618750146169
n3
5.3382645917865E+23
n4
4.3304543134775E+31
n5
3.5129084065952E+39
2 √n
9006.7204353194
3 √n
432.89023418312
4 √n
94.903742999522
5 √n
38.179186728187
8 divisors
τ
Total Divisors
8
Total number of the positive divisors of n
σ
Sum of Divisors
1
Sum of all the positive divisors of n
s
Aliquot Sum
-81121012
Sum of the proper positive divisors of n
A
Arithmetic Mean
0.125
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
8
Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 81121013 can be divided by 8 positive divisors.
The sum of these divisors (counting 81121013) is 1, the average is 0.125.
Base
System
Value
2
Binary
100110101011100111011110101
3
Ternary
12122122101002222
4
Quaternary
10311130323311
5
Quinary
131231333023
6
Senary
12014412125
8
Octal
465347365
10
Decimal
81121013
12
Duodecimal
23201045
16
Hexadecimal
4d5cef5
20
Vigesimal
15702ad
36
Base36
1capdh
md5
11fdcba7227e72d0f726e23381a9ee0e
sha1
3fa47f04f95af8bb1e6f0965afe528c25f29319d
sha256
055f36ca101887013fa62c8f62f0274649979c9acd7409b08de0ecf401d62338
sha512
eea9c79a238ed3f0f40663ff00e10b3642e66cdefa55ca20cff8a18858902c1a628cdd47ec6573aa287a869dc14f57fc575b4274c1eb5e8e09ce8a04034956bb
ripemd-160
01b58643521191d9e4a04233b9fd71d90bada210
Diameter
162242026
Circumference
509698356.98512
Area
2.0673623521534E+16
Volume
2.2360870432633E+24
Surface area
8.2694494086138E+16
Circumference
509698356.98512
Perimeter
324484052
Area
6580618750146169
Diagonal
114722436.77804
Surface area
39483712500877014
Volume
5.3382645917865E+23
Space diagonal
140505716.07746
Perimeter
243363039
Area
2.8494915051234E+15
Altitude
70252858.038728
Surface area
2.8494915051234E+15
Volume
6.2912051543671E+22
Height
38240812.259348