21497731 is an odd 8-digits prime number following 21497730
and preceding 21497732 . In scientific notation, it is written as 2.1497731 × 10^7.
The sum of its digits is 34. It has a total of 1 prime factors and 2 positive divisors.
There are 21497730 positive integers (up to 21497731) that are relatively prime to 21497731.
21497731 has 2 divisors, whose sum is 21497732
The reverse of 21497731 is 13779412
Previous prime number is 1
Is Prime? yes Number parity odd Number length 8 Sum of Digits 34 Digital Root 7
Name
twenty-one million four hundred ninety-seven thousand seven hundred thirty-one
Scientific notation
2.1497731 × 10^7
Engineering notation
2.1497731 × 10^6
Prime Factorization
21497731
Composite number
ω Distinct Factors
1 Total number of distinct prime factors
Ω Total Factors
1 Total number of prime factors
rad Radical
21497731 Product of the distinct prime numbers
The prime factorization of 21497731 is 21497731.
Since it has a total of 1 prime factors.
8 , 8 , 72 , 25 , 490 , 168 , 21 , 5098 , 79427 , 5027 , 356717 , 497130 , 9600425 , 9178083 , 21519594 , 86720511 , 581481836 , 57722942 , 7255562257 , 8738461654
n×2
42995462
n×3
64493193
n×4
85990924
n×5
107488655
n÷2
10748865.5
n÷3
7165910.3333333
n÷3
5374432.75
n÷5
4299546.2
n2
462152438148361
n3
9.9352287963076E+21
n4
2.1358487608647E+29
n5
4.5915902117754E+36
2 √n4636.5645687297
3 √n278.05510613338
4 √n68.092323860548
5 √n29.273761138812
2 divisors
τ Total Divisors
2 Total number of the positive divisors of n
σ Sum of Divisors
21497732 Sum of all the positive divisors of n
s Aliquot Sum
1 Sum of the proper positive divisors of n
A Arithmetic Mean
10748866 Returns the sum of divisors (σ(n )) divided by the total number of divisors (τ(n ))
G Geometric Mean
4636.5646765682 Returns the nth root of the product of n divisors
H Harmonic Mean
1.9999999069669 Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 21497731 can be divided by 2 positive divisors.
The sum of these divisors (counting 21497731) is 21497732, the average is 10748866.
Base
System
Value
2
Binary
1010010000000011110000011
3
Ternary
1111110012100021
4
Quaternary
1102000132003
5
Quinary
21000411411
6
Senary
2044434311
8
Octal
122003603
10
Decimal
21497731
12
Duodecimal
7248997
16
Hexadecimal
1480783
20
Vigesimal
6e746b
36
Base36
csrr7
md5
313889ed46bd30e48abcf884da536e04
sha1
ec63e34682f7e05e4d3f5ba4e1b78a0fb3c3e167
sha256
5ba71d61f584c416ebd9f08fee644ad297a0b5376707122013f59b765993646c
sha512
b5333988aa1fe3bd7b312110bfe30c6f405ef29d4e98d73bd84af4d8d7fa4ab6e4303399387578d07463428f037d5c6638e8c519d899915e0a36798ff283d03f
ripemd-160
13703a97aea8d37c8bd82e148823f3a1cf1e1ab4
Diameter
42995462
Circumference
135074227.5569
Area
1.4518947045255E+15
Volume
4.1616589064285E+22
Surface area
5.807578818102E+15
Circumference
135074227.5569
Perimeter
85990924
Area
462152438148361
Diagonal
30402382.740449
Surface area
2772914628890166
Volume
9.9352287963076E+21
Space diagonal
37235162.339448
Perimeter
64493193
Area
2.001178759287E+14
Altitude
18617581.169724
Surface area
2.001178759287E+14
Volume
1.1708779424182E+21
Height
10134127.58015