81974865 is an odd 8-digits composite number following 81974864
and preceding 81974866 . In scientific notation, it is written as 8.1974865 × 10^7.
The sum of its digits is 48. It has a total of 4 prime factors and 16 positive divisors.
There are 37350144 positive integers (up to 81974865) that are relatively prime to 81974865.
81974865 has 16 divisors, whose sum is 103395600
The reverse of 81974865 is 56847918
Previous prime number is 2237
Is Prime? no Number parity odd Number length 8 Sum of Digits 48 Digital Root 3
Name
eighty-one million nine hundred seventy-four thousand eight hundred sixty-five
Scientific notation
8.1974865 × 10^7
Engineering notation
8.1974865 × 10^6
Prime Factorization
21 × 5 × 2237 × 349
Composite number
ω Distinct Factors
4 Total number of distinct prime factors
Ω Total Factors
4 Total number of prime factors
rad Radical
81974865 Product of the distinct prime numbers
The prime factorization of 81974865 is 21 × 5 × 2237 × 349.
Since it has a total of 4 prime factors.
5 , 7 , 99 , 25 , 225 , 105 , 2217 , 7408 , 16568 , 31017 , 640375 , 82075 , 7616743 , 9981860 , 15858138 , 77575515 , 986495467 , 720428644 , 2236288308 , 5058448075
n×2
163949730
n×3
245924595
n×4
327899460
n×5
409874325
n÷2
40987432.5
n÷3
27324955
n÷3
20493716.25
n÷5
16394973
n2
6719878491768225
n3
5.508611321791E+23
n4
4.5156766944129E+31
n5
3.7017198740815E+39
2 √n9053.9971835648
3 √n434.40375438931
4 √n95.152494363337
5 √n38.259222670214
1 , 5 , 21 , 105 , 349 , 1745 , 2237 , 7329 , 11185 , 36645 , 46977 , 234885 , 780713 , 3903565 , 16394973 , 81974865
16 divisors
τ Total Divisors
16 Total number of the positive divisors of n
σ Sum of Divisors
1 Sum of all the positive divisors of n
s Aliquot Sum
-81974864 Sum of the proper positive divisors of n
A Arithmetic Mean
0.0625 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
16 Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 81974865 can be divided by 16 positive divisors.
The sum of these divisors (counting 81974865) is 1, the average is 0.0625.
Base
System
Value
2
Binary
100111000101101011001010001
3
Ternary
12201020202101010
4
Quaternary
10320231121101
5
Quinary
131441143430
6
Senary
12045001133
8
Octal
470553121
10
Decimal
81974865
12
Duodecimal
235531a9
16
Hexadecimal
4e2d651
20
Vigesimal
15c6h35
36
Base36
1ct07l
md5
679bc6e47e8ba2c4c82594cc1c0917fa
sha1
454c2c332e7346985edf7131aa82c71e6c51f4bd
sha256
64343af97947912c3896a4ae60822a1447499263f40275a6f032c8254670c195
sha512
fe28b2b3bd4423e3bde820ee442d6f8a45fd72facc18111fab2875dd80c72bf50158d91589495516c9dfe4a542b8065ab4cd38aa0325fcc66e3c1e9290db4d96
ripemd-160
99c9ace08b568cb3c84489db3757037e4b362c54
Diameter
163949730
Circumference
515063267.32603
Area
2.1111120902755E+16
Volume
2.3074417146694E+24
Surface area
8.444448361102E+16
Circumference
515063267.32603
Perimeter
327899460
Area
6719878491768225
Diagonal
115929965.8567
Surface area
40319270950609350
Volume
5.508611321791E+23
Space diagonal
141984631.1236
Perimeter
245924595
Area
2.909792742108E+15
Altitude
70992315.5618
Surface area
2.909792742108E+15
Volume
6.4919607009324E+22
Height
38643321.952235