81997243 is an odd 8-digits prime number following 81997242
and preceding 81997244 . In scientific notation, it is written as 8.1997243 × 10^7.
The sum of its digits is 43. It has a total of 1 prime factors and 2 positive divisors.
There are 81997242 positive integers (up to 81997243) that are relatively prime to 81997243.
81997243 has 2 divisors, whose sum is 81997244
The reverse of 81997243 is 34279918
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 ninety-seven thousand two hundred forty-three
Scientific notation
8.1997243 × 10^7
Engineering notation
8.1997243 × 10^6
Prime Factorization
81997243
Composite number
ω Distinct Factors
1 Total number of distinct prime factors
Ω Total Factors
1 Total number of prime factors
rad Radical
81997243 Product of the distinct prime numbers
The prime factorization of 81997243 is 81997243.
Since it has a total of 1 prime factors.
1 , 3 , 81 , 41 , 926 , 918 , 1826 , 4037 , 62224 , 30624 , 269124 , 263967 , 5530686 , 1550467 , 19171187 , 9164867 , 547166780 , 525373863 , 5003409728 , 2145107513
n×2
163994486
n×3
245991729
n×4
327988972
n×5
409986215
n÷2
40998621.5
n÷3
27332414.333333
n÷3
20499310.75
n÷5
16399448.6
n2
6723547859601049
n3
5.5131238766584E+23
n4
4.5206095820346E+31
n5
3.7067752240622E+39
2 √n9055.2329069991
3 √n434.44327952414
4 √n95.158987526135
5 √n38.26131128948
2 divisors
τ Total Divisors
2 Total number of the positive divisors of n
σ Sum of Divisors
81997244 Sum of all the positive divisors of n
s Aliquot Sum
1 Sum of the proper positive divisors of n
A Arithmetic Mean
40998622 Returns the sum of divisors (σ(n )) divided by the total number of divisors (τ(n ))
G Geometric Mean
9055.2329622158 Returns the nth root of the product of n divisors
H Harmonic Mean
1.9999999756089 Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 81997243 can be divided by 2 positive divisors.
The sum of these divisors (counting 81997243) is 81997244, the average is 40998622.
Base
System
Value
2
Binary
100111000110010110110111011
3
Ternary
12201021220001221
4
Quaternary
10320302312323
5
Quinary
131442402433
6
Senary
12045252511
8
Octal
470626673
10
Decimal
81997243
12
Duodecimal
23564137
16
Hexadecimal
4e32dbb
20
Vigesimal
15c9d23
36
Base36
1cthh7
md5
d90e294ade1917081872230b5a0b5e14
sha1
5c28429fbc88cff1d3ca129553accc6cb3544555
sha256
0cd4b577e7ed9915089789215d34cf5de30fab898fb21217dfc594820c3da17e
sha512
28c6cbd9c4b85ae4a6a71892e32408e51521029c8ae593c9feab52f30e9460cb69dc21f2e765822bdadee5e208bfe824fb518740137b652a038c1578de228f46
ripemd-160
09f855f596988dd71115d98074d7211396c84130
Diameter
163994486
Circumference
515203872.44683
Area
2.1122648561782E+16
Volume
2.3093319292321E+24
Surface area
8.4490594247128E+16
Circumference
515203872.44683
Perimeter
327988972
Area
6723547859601049
Diagonal
115961613.1278
Surface area
40341287157606294
Volume
5.5131238766584E+23
Space diagonal
142023390.95657
Perimeter
245991729
Area
2.9113816249875E+15
Altitude
71011695.478286
Surface area
2.9113816249875E+15
Volume
6.4972787978443E+22
Height
38653871.042601