81497761 is an odd 8-digits prime number following 81497760
and preceding 81497762 . In scientific notation, it is written as 8.1497761 × 10^7.
The sum of its digits is 43. It has a total of 1 prime factors and 2 positive divisors.
There are 81497760 positive integers (up to 81497761) that are relatively prime to 81497761.
81497761 has 2 divisors, whose sum is 81497762
The reverse of 81497761 is 16779418
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 four hundred ninety-seven thousand seven hundred sixty-one
Scientific notation
8.1497761 × 10^7
Engineering notation
8.1497761 × 10^6
Prime Factorization
81497761
Composite number
ω
Distinct Factors
1
Total number of distinct prime factors
Ω
Total Factors
1
Total number of prime factors
rad
Radical
81497761
Product of the distinct prime numbers
The prime factorization of 81497761 is 81497761.
Since it has a total of 1 prime factors.
7 , 4 , 58 , 77 , 373 , 288 , 8585 , 7983 , 72995 , 94947 , 126671 , 379488 , 190864 , 8443819 , 94905989 , 55671133 , 122962999 , 502971793 , 4441046704 , 6309606656
n×2
162995522
n×3
244493283
n×4
325991044
n×5
407488805
n÷2
40748880.5
n÷3
27165920.333333
n÷3
20374440.25
n÷5
16299552.2
n2
6641885048013121
n3
5.4129876023245E+23
n4
4.411463699102E+31
n5
3.5952441420959E+39
2 √n
9027.6110350413
3 √n
433.55935263737
4 √n
95.013741295885
5 √n
38.214583932378
2 divisors
τ
Total Divisors
2
Total number of the positive divisors of n
σ
Sum of Divisors
81497762
Sum of all the positive divisors of n
s
Aliquot Sum
1
Sum of the proper positive divisors of n
A
Arithmetic Mean
40748881
Returns the sum of divisors (σ(n )) divided by the total number of divisors (τ(n ))
G
Geometric Mean
9027.611090427
Returns the nth root of the product of n divisors
H
Harmonic Mean
1.9999999754594
Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 81497761 can be divided by 2 positive divisors.
The sum of these divisors (counting 81497761) is 81497762, the average is 40748881.
Base
System
Value
2
Binary
100110110111000111010100001
3
Ternary
12200100111220121
4
Quaternary
10312320322201
5
Quinary
131330412021
6
Senary
12030440241
8
Octal
466707241
10
Decimal
81497761
12
Duodecimal
23363081
16
Hexadecimal
4db8ea1
20
Vigesimal
1597481
36
Base36
1cis2p
md5
39d3ddb523e96faa0d6a5c2ee527277f
sha1
2fe72fa8d97698afb835e33924e61e347efefe8c
sha256
825d5c341d39fb02a8ee97ec2fed0f75048405428d749ade9ca107b5a27fda98
sha512
68df8e61c2092f0140104cd24bebe79b8641e34dd970baf3ad6fa15198946cdbc8a1b447a73a25167e862e0449d079b08223dda9d23676ee7df2bacfb36e619f
ripemd-160
df014faba114f549775802219fcb2af7c72d81c9
Diameter
162995522
Circumference
512065534.48323
Area
2.0866097272826E+16
Volume
2.2673869447247E+24
Surface area
8.3464389091304E+16
Circumference
512065534.48323
Perimeter
325991044
Area
6641885048013121
Diagonal
115255238.90924
Surface area
39851310288078726
Volume
5.4129876023245E+23
Space diagonal
141158262.75511
Perimeter
244493283
Area
2.8760205902977E+15
Altitude
70579131.377553
Surface area
2.8760205902977E+15
Volume
6.3792670668039E+22
Height
38418412.969747