81128545 is an odd 8-digits composite number following 81128544
and preceding 81128546 . In scientific notation, it is written as 8.1128545 × 10^7.
The sum of its digits is 34. It has a total of 3 prime factors and 8 positive divisors.
There are 63319680 positive integers (up to 81128545) that are relatively prime to 81128545.
81128545 has 8 divisors, whose sum is 99729000
The reverse of 81128545 is 54582118
Previous prime number is 41
Is Prime? no
Number parity odd
Number length 8
Sum of Digits 34
Digital Root 7
Name
eighty-one million one hundred twenty-eight thousand five hundred forty-five
Scientific notation
8.1128545 × 10^7
Engineering notation
8.1128545 × 10^6
Prime Factorization
5 × 41 × 395749
Composite number
ω
Distinct Factors
3
Total number of distinct prime factors
Ω
Total Factors
3
Total number of prime factors
rad
Radical
81128545
Product of the distinct prime numbers
The prime factorization of 81128545 is 5 × 41 × 395749.
Since it has a total of 3 prime factors.
2 , 4 , 20 , 3 , 915 , 790 , 2208 , 4587 , 94027 , 36130 , 135930 , 994329 , 1619681 , 9004044 , 82310839 , 28065164 , 957281456 , 607649280 , 203673382 , 7391927640
n×2
162257090
n×3
243385635
n×4
324514180
n×5
405642725
n÷2
40564272.5
n÷3
27042848.333333
n÷3
20282136.25
n÷5
16225709
n2
6581840813817025
n3
5.3397516864659E+23
n4
4.3320628498428E+31
n5
3.514539558563E+39
2 √n
9007.1385578329
3 √n
432.90363156815
4 √n
94.905945850789
5 √n
38.179895681255
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
-81128544
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 81128545 can be divided by 8 positive divisors.
The sum of these divisors (counting 81128545) is 1, the average is 0.125.
Base
System
Value
2
Binary
100110101011110110001100001
3
Ternary
12122122202102221
4
Quaternary
10311132301201
5
Quinary
131232103140
6
Senary
12014511041
8
Octal
465366141
10
Decimal
81128545
12
Duodecimal
23205481
16
Hexadecimal
4d5ec61
20
Vigesimal
1571175
36
Base36
1cav6p
md5
7103a136f3550969b35e40e397196aff
sha1
eb20a8e0c0e9e639e30d695b1569ed7765603def
sha256
be686c067bb3640a782fc73b24e508ee71acdc3a2a9ac9f55154d41444ac9c59
sha512
24a6ef0135322a1e29920df8c8037464d099d5433a2a75e098027c857457c0882e4915f8ff6b6f2690f058fcda3cb91692a95b6144b6ae68b31ed2f14c0cf128
ripemd-160
8d118e0646b58cb37a70d2d77ae5d763bb5e3c18
Diameter
162257090
Circumference
509745681.93686
Area
2.0677462747785E+16
Volume
2.236709956026E+24
Surface area
8.270985099114E+16
Circumference
509745681.93686
Perimeter
324514180
Area
6581840813817025
Diagonal
114733088.6346
Surface area
39491044882902150
Volume
5.3397516864659E+23
Space diagonal
140518761.88414
Perimeter
243385635
Area
2.8500206742154E+15
Altitude
70259380.942069
Surface area
2.8500206742154E+15
Volume
6.2929577122539E+22
Height
38244362.878199