21243721 is an odd 8-digits prime number following 21243720
and preceding 21243722 . In scientific notation, it is written as 2.1243721 × 10^7.
The sum of its digits is 22. It has a total of 1 prime factors and 2 positive divisors.
There are 21243720 positive integers (up to 21243721) that are relatively prime to 21243721.
21243721 has 2 divisors, whose sum is 21243722
The reverse of 21243721 is 12734212
Previous prime number is 1
Is Prime? yes Number parity odd Number length 8 Sum of Digits 22 Digital Root 4
Name
twenty-one million two hundred forty-three thousand seven hundred twenty-one
Scientific notation
2.1243721 × 10^7
Engineering notation
2.1243721 × 10^6
Prime Factorization
21243721
Composite number
ω Distinct Factors
1 Total number of distinct prime factors
Ω Total Factors
1 Total number of prime factors
rad Radical
21243721 Product of the distinct prime numbers
The prime factorization of 21243721 is 21243721.
Since it has a total of 1 prime factors.
4 , 7 , 25 , 30 , 955 , 317 , 3956 , 316 , 53205 , 27331 , 899957 , 340417 , 9073864 , 9792246 , 40993143 , 22017743 , 141932095 , 413613121 , 9827940401 , 3940646919
n×2
42487442
n×3
63731163
n×4
84974884
n×5
106218605
n÷2
10621860.5
n÷3
7081240.3333333
n÷3
5310930.25
n÷5
4248744.2
n2
451295681925841
n3
9.5871995553373E+21
n4
2.0366779252491E+29
n5
4.3266617610851E+36
2 √n4609.0911251569
3 √n276.95562896264
4 √n67.89028741401
5 √n29.204254054581
2 divisors
τ Total Divisors
2 Total number of the positive divisors of n
σ Sum of Divisors
21243722 Sum of all the positive divisors of n
s Aliquot Sum
1 Sum of the proper positive divisors of n
A Arithmetic Mean
10621861 Returns the sum of divisors (σ(n )) divided by the total number of divisors (τ(n ))
G Geometric Mean
4609.0912336381 Returns the nth root of the product of n divisors
H Harmonic Mean
1.9999999058545 Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 21243721 can be divided by 2 positive divisors.
The sum of these divisors (counting 21243721) is 21243722, the average is 10621861.
Base
System
Value
2
Binary
1010001000010011101001001
3
Ternary
1110222021220111
4
Quaternary
1101002131021
5
Quinary
20414244341
6
Senary
2035154321
8
Octal
121023511
10
Decimal
21243721
12
Duodecimal
71459a1
16
Hexadecimal
1442749
20
Vigesimal
6cf961
36
Base36
cnbrd
md5
42226be4d565cd421d516cd28300040f
sha1
65a3b79a989150c4399cbc3d59d57e94f000aab7
sha256
c0dc137b8341ac1d6b36a24056b7ba6de7f44caa2633d01537342541640192fc
sha512
cbe5a674c137de00a3bb4b10bc694d6f0239afdaed09b89b38c03ab8445307c016150dda3cc3747c818d7f3553fb02c7faee70c15bf83131c39a8e1bb4768ce1
ripemd-160
7f6398eb7acb3b8f5ccc89be4098537d38d33f4e
Diameter
42487442
Circumference
133478235.65702
Area
1.417787198935E+15
Volume
4.0158767588729E+22
Surface area
5.6711487957401E+15
Circumference
133478235.65702
Perimeter
84974884
Area
451295681925841
Diagonal
30043158.35347
Surface area
2707774091555046
Volume
9.5871995553373E+21
Space diagonal
36795204.113818
Perimeter
63731163
Area
1.95416762583E+14
Altitude
18397602.056909
Surface area
1.95416762583E+14
Volume
1.1298623030279E+21
Height
10014386.117823