21131281 is an odd 8-digits composite number following 21131280
and preceding 21131282 . In scientific notation, it is written as 2.1131281 × 10^7.
The sum of its digits is 19. It has a total of 2 prime factors and 4 positive divisors.
There are 21118500 positive integers (up to 21131281) that are relatively prime to 21131281.
21131281 has 4 divisors, whose sum is 21144064
The reverse of 21131281 is 18213112
Previous prime number is 1951
Is Prime? no
Number parity odd
Number length 8
Sum of Digits 19
Digital Root 1
Name
twenty-one million one hundred thirty-one thousand two hundred eighty-one
Scientific notation
2.1131281 × 10^7
Engineering notation
2.1131281 × 10^6
Prime Factorization
1951 × 10831
Composite number
ω
Distinct Factors
2
Total number of distinct prime factors
Ω
Total Factors
2
Total number of prime factors
rad
Radical
21131281
Product of the distinct prime numbers
The prime factorization of 21131281 is 1951 × 10831.
Since it has a total of 2 prime factors.
8 , 5 , 40 , 92 , 726 , 899 , 7617 , 203 , 63093 , 94952 , 330612 , 279231 , 2995621 , 2578431 , 91300891 , 76050868 , 188118790 , 867643471 , 5661255500 , 8476747508
n×2
42262562
n×3
63393843
n×4
84525124
n×5
105656405
n÷2
10565640.5
n÷3
7043760.3333333
n÷3
5282820.25
n÷5
4226256.2
n2
446531036700961
n3
9.4357728117493E+21
n4
1.9938996673723E+29
n5
4.2133654157052E+36
2 √n
4596.8773096527
3 √n
276.46613539283
4 √n
67.800275144373
5 √n
29.173273600592
4 divisors
τ
Total Divisors
4
Total number of the positive divisors of n
σ
Sum of Divisors
1
Sum of all the positive divisors of n
s
Aliquot Sum
-21131280
Sum of the proper positive divisors of n
A
Arithmetic Mean
0.25
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
4
Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 21131281 can be divided by 4 positive divisors.
The sum of these divisors (counting 21131281) is 1, the average is 0.25.
Base
System
Value
2
Binary
1010000100111000000010001
3
Ternary
1110202120200001
4
Quaternary
1100213000101
5
Quinary
20402200111
6
Senary
2032530001
8
Octal
120470021
10
Decimal
21131281
12
Duodecimal
70b0901
16
Hexadecimal
1427011
20
Vigesimal
6c1841
36
Base36
ckx01
md5
a010074fc1dc0acbd1b3caf6b10ac899
sha1
fb9fb9cf2ad1b6bb3c0cfc495ff6c75eda04d516
sha256
fb7b6724e4c3c39142a5085f7f8149eb80e5a5325f916340b427a225f472f8fe
sha512
5841f34f14ebcd791a59bf0c3c0aac89785b3633fe464e52fda4028205b6df0d56d91009d3728d26887f28731e793d4eb6a3e367c1253c05493b0201c74ac31b
ripemd-160
5cacfa740dc83016f38cc1b3273b7e7703041497
Diameter
42262562
Circumference
132771754.30108
Area
1.4028186244996E+15
Volume
3.9524472728445E+22
Surface area
5.6112744979983E+15
Circumference
132771754.30108
Perimeter
84525124
Area
446531036700961
Diagonal
29884144.180517
Surface area
2679186220205766
Volume
9.4357728117493E+21
Space diagonal
36600452.321015
Perimeter
63393843
Area
1.9335361068062E+14
Altitude
18300226.160507
Surface area
1.9335361068062E+14
Volume
1.1120164901539E+21
Height
9961381.3935056