21931389 is an odd 8-digits composite number following 21931388
and preceding 21931390 . In scientific notation, it is written as 2.1931389 × 10^7.
The sum of its digits is 36. It has a total of 4 prime factors and 12 positive divisors.
There are 14599872 positive integers (up to 21931389) that are relatively prime to 21931389.
21931389 has 12 divisors, whose sum is 31724316
The reverse of 21931389 is 98313912
Previous prime number is 2557
Is Prime? no
Number parity odd
Number length 8
Sum of Digits 36
Digital Root 9
Name
twenty-one million nine hundred thirty-one thousand three hundred eighty-nine
Scientific notation
2.1931389 × 10^7
Engineering notation
2.1931389 × 10^6
Prime Factorization
3 × 3 × 2557 × 953
Composite number
ω
Distinct Factors
3
Total number of distinct prime factors
Ω
Total Factors
4
Total number of prime factors
rad
Radical
7310463
Product of the distinct prime numbers
The prime factorization of 21931389 is 3 × 3 × 2557 × 953.
Since it has a total of 4 prime factors.
5 , 9 , 70 , 58 , 829 , 436 , 6568 , 5118 , 84110 , 84471 , 369265 , 188271 , 3610657 , 2964876 , 89095138 , 99943759 , 728711948 , 83457813 , 1558990669 , 8553709293
n×2
43862778
n×3
65794167
n×4
87725556
n×5
109656945
n÷2
10965694.5
n÷3
7310463
n÷3
5482847.25
n÷5
4386277.8
n2
480985823469321
n3
1.0548687197991E+22
n4
2.3134736237846E+29
n5
5.073768998446E+36
2 √n
4683.0960912627
3 √n
279.91234075678
4 √n
68.433150528546
5 √n
29.39092317866
1 , 3 , 9 , 953 , 2557 , 2859 , 7671 , 8577 , 23013 , 2436821 , 7310463 , 21931389
12 divisors
τ
Total Divisors
12
Total number of the positive divisors of n
σ
Sum of Divisors
1
Sum of all the positive divisors of n
s
Aliquot Sum
-21931388
Sum of the proper positive divisors of n
A
Arithmetic Mean
0.083333333333333
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
12
Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 21931389 can be divided by 12 positive divisors.
The sum of these divisors (counting 21931389) is 1, the average is 0.083333333333333.
Base
System
Value
2
Binary
1010011101010010101111101
3
Ternary
1112021020012200
4
Quaternary
1103222111331
5
Quinary
21103301024
6
Senary
2102022113
8
Octal
123522575
10
Decimal
21931389
12
Duodecimal
7417939
16
Hexadecimal
14ea57d
20
Vigesimal
6h1899
36
Base36
d22d9
md5
c58383aef6d72ce1bd5ca09b51f48403
sha1
5f09465097a64a66d44135346716547bab6ed5c9
sha256
7dacb2edcbf7703c9aef03c46a24b161db1f2567bcbde2a313851d68c445979f
sha512
07327422b7e7096a0b4fa0ccab898368a9dade8542a6cd8055e5625be0dc0f1bcd06b0873a628086ecede0eac396995b29eab25d77d5dbf636c49b3d9ac67236
ripemd-160
67b362dffc9ea5eca459c27ff646349e0e8d9e48
Diameter
43862778
Circumference
137798981.13084
Area
1.5110615294921E+15
Volume
4.41862376083E+22
Surface area
6.0442461179682E+15
Circumference
137798981.13084
Perimeter
87725556
Area
480985823469321
Diagonal
31015667.76548
Surface area
2885914940815926
Volume
1.0548687197991E+22
Space diagonal
37986280.028557
Perimeter
65794167
Area
2.082729709923E+14
Altitude
18993140.014279
Surface area
2.082729709923E+14
Volume
1.2431747083859E+21
Height
10338555.921827