81244981 is an odd 8-digits prime number following 81244980
and preceding 81244982 . In scientific notation, it is written as 8.1244981 × 10^7.
The sum of its digits is 37. It has a total of 1 prime factors and 2 positive divisors.
There are 81244980 positive integers (up to 81244981) that are relatively prime to 81244981.
81244981 has 2 divisors, whose sum is 81244982
The reverse of 81244981 is 18944218
Previous prime number is 1
Is Prime? yes
Number parity odd
Number length 8
Sum of Digits 37
Digital Root 1
Name
eighty-one million two hundred forty-four thousand nine hundred eighty-one
Scientific notation
8.1244981 × 10^7
Engineering notation
8.1244981 × 10^6
Prime Factorization
81244981
Composite number
ω
Distinct Factors
1
Total number of distinct prime factors
Ω
Total Factors
1
Total number of prime factors
rad
Radical
81244981
Product of the distinct prime numbers
The prime factorization of 81244981 is 81244981.
Since it has a total of 1 prime factors.
6 , 4 , 61 , 85 , 425 , 886 , 1933 , 5462 , 74897 , 7490 , 582441 , 837416 , 6869346 , 728985 , 47968261 , 81582432 , 438921882 , 553057032 , 2840369888 , 844228746
n×2
162489962
n×3
243734943
n×4
324979924
n×5
406224905
n÷2
40622490.5
n÷3
27081660.333333
n÷3
20311245.25
n÷5
16248996.2
n2
6600746937690361
n3
5.3627755953846E+23
n4
4.3569860135429E+31
n5
3.5398324588756E+39
2 √n
9013.5997803319
3 √n
433.11063422205
4 √n
94.939979883777
5 √n
38.190848581843
2 divisors
τ
Total Divisors
2
Total number of the positive divisors of n
σ
Sum of Divisors
81244982
Sum of all the positive divisors of n
s
Aliquot Sum
1
Sum of the proper positive divisors of n
A
Arithmetic Mean
40622491
Returns the sum of divisors (σ(n )) divided by the total number of divisors (τ(n ))
G
Geometric Mean
9013.5998358037
Returns the nth root of the product of n divisors
H
Harmonic Mean
1.9999999753831
Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 81244981 can be divided by 2 positive divisors.
The sum of these divisors (counting 81244981) is 81244982, the average is 40622491.
Base
System
Value
2
Binary
100110101111011001100110101
3
Ternary
12122212200011101
4
Quaternary
10311323030311
5
Quinary
131244314411
6
Senary
12021210101
8
Octal
465731465
10
Decimal
81244981
12
Duodecimal
23260931
16
Hexadecimal
4d7b335
20
Vigesimal
157fc91
36
Base36
1cdd11
md5
4d9693c2c6f35c7ddb1f5299831b1db9
sha1
8f453d915506851546b87685c1c30f3ebc77bf05
sha256
1324398c80360995ee4bfb9c2f908c125acf5e6972989f32177fc77ec4c29d1f
sha512
e2fba2c44e13494478f5040db77b4b4bb8ab60755ecdd519c0847ad44778b8cb5d11437d5c17c28e5243eea133036e327f1272023bdd153d8f3ddfbd4666a6ea
ripemd-160
df988e9c3d52b54417b67b9f033d13cfc17a9dcb
Diameter
162489962
Circumference
510477270.90128
Area
2.0736858087653E+16
Volume
2.2463541884415E+24
Surface area
8.2947432350613E+16
Circumference
510477270.90128
Perimeter
324979924
Area
6600746937690361
Diagonal
114897754.00494
Surface area
39604481626142166
Volume
5.3627755953846E+23
Space diagonal
140720434.95197
Perimeter
243734943
Area
2.8582072659961E+15
Altitude
70360217.475984
Surface area
2.8582072659961E+15
Volume
6.3200916491303E+22
Height
38299251.334981