81931446 is an even 8-digits composite number following 81931445
and preceding 81931447 . In scientific notation, it is written as 8.1931446 × 10^7.
The sum of its digits is 36. It has a total of 5 prime factors and 32 positive divisors.
There are 27259848 positive integers (up to 81931446) that are relatively prime to 81931446.
81931446 has 32 divisors, whose sum is 182407680
The reverse of 81931446 is 64413918
Previous prime number is 727
Is Prime? no Number parity even Number length 8 Sum of Digits 36 Digital Root 9
Name
eighty-one million nine hundred thirty-one thousand four hundred forty-six
Scientific notation
8.1931446 × 10^7
Engineering notation
8.1931446 × 10^6
Prime Factorization
2 × 9 × 3 × 727 × 2087
Composite number
ω Distinct Factors
5 Total number of distinct prime factors
Ω Total Factors
5 Total number of prime factors
rad Radical
81931446 Product of the distinct prime numbers
The prime factorization of 81931446 is 2 × 9 × 3 × 727 × 2087.
Since it has a total of 5 prime factors.
4 , 5 , 67 , 14 , 55 , 293 , 885 , 2667 , 64261 , 48530 , 111322 , 172930 , 3415113 , 7188292 , 16863658 , 87871111 , 241659854 , 758927889 , 5865545930 , 9250435006
n×2
163862892
n×3
245794338
n×4
327725784
n×5
409657230
n÷2
40965723
n÷3
27310482
n÷3
20482861.5
n÷5
16386289.2
n2
6712761843650916
n3
5.4998628450395E+23
n4
4.5061171569576E+31
n5
3.6919269451494E+39
2 √n9051.5990852446
3 √n434.32704507259
4 √n95.139892186425
5 √n38.255168917283
1 , 2 , 3 , 6 , 9 , 18 , 27 , 54 , 727 , 1454 , 2087 , 2181 , 4174 , 4362 , 6261 , 6543 , 12522 , 13086 , 18783 , 19629 , 37566 , 39258 , 56349 , 112698 , 1517249 , 3034498 , 4551747 , 9103494 , 13655241 , 27310482 , 40965723 , 81931446
32 divisors
τ Total Divisors
32 Total number of the positive divisors of n
σ Sum of Divisors
1 Sum of all the positive divisors of n
s Aliquot Sum
-81931445 Sum of the proper positive divisors of n
A Arithmetic Mean
0.03125 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
32 Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 81931446 can be divided by 32 positive divisors.
The sum of these divisors (counting 81931446) is 1, the average is 0.03125.
Base
System
Value
2
Binary
100111000100010110010110110
3
Ternary
12201011112211000
4
Quaternary
10320202302312
5
Quinary
131433301241
6
Senary
12044024130
8
Octal
470426266
10
Decimal
81931446
12
Duodecimal
23532046
16
Hexadecimal
4e22cb6
20
Vigesimal
15c18c6
36
Base36
1cs2pi
md5
c6d4aa5c0d411269bd8877b04c377981
sha1
294c26e69515eeffc28af916028bc9439df88688
sha256
8650912b973e91c24b6d2d394605a84a9b92d9d15da85401f10f2049771afd39
sha512
d0d0706c5b9222dc40fdea200b0b83ab979288bed8f9c843fcb78affa6d552ed1dccae4d6329cb68d030a2853874b560825f769a5ac8bdf724313f0a250b44aa
ripemd-160
1f56df6ffcc36e49ee9f5cdfee1de2690f7553d6
Diameter
163862892
Circumference
514790457.70318
Area
2.1088763293312E+16
Volume
2.303777161297E+24
Surface area
8.4355053173246E+16
Circumference
514790457.70318
Perimeter
327725784
Area
6712761843650916
Diagonal
115868562.11804
Surface area
40276571061905496
Volume
5.4998628450395E+23
Space diagonal
141909427.20959
Perimeter
245794338
Area
2.9067111430783E+15
Altitude
70954713.604793
Surface area
2.9067111430783E+15
Volume
6.4816505222056E+22
Height
38622854.039346