21538861 is an odd 8-digits prime number following 21538860
and preceding 21538862 . In scientific notation, it is written as 2.1538861 × 10^7.
The sum of its digits is 34. It has a total of 1 prime factors and 2 positive divisors.
There are 21538860 positive integers (up to 21538861) that are relatively prime to 21538861.
21538861 has 2 divisors, whose sum is 21538862
The reverse of 21538861 is 16883512
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 five hundred thirty-eight thousand eight hundred sixty-one
Scientific notation
2.1538861 × 10^7
Engineering notation
2.1538861 × 10^6
Prime Factorization
21538861
Composite number
ω Distinct Factors
1 Total number of distinct prime factors
Ω Total Factors
1 Total number of prime factors
rad Radical
21538861 Product of the distinct prime numbers
The prime factorization of 21538861 is 21538861.
Since it has a total of 1 prime factors.
1 , 5 , 1 , 20 , 588 , 235 , 9883 , 9859 , 31789 , 446 , 799260 , 205082 , 2190530 , 2231691 , 52774922 , 71055702 , 786204430 , 921431495 , 374012102 , 2747487783
n×2
43077722
n×3
64616583
n×4
86155444
n×5
107694305
n÷2
10769430.5
n÷3
7179620.3333333
n÷3
5384715.25
n÷5
4307772.2
n2
463922533177321
n3
9.9923629568742E+21
n4
2.1522411678966E+29
n5
4.6356823353803E+36
2 √n4640.9978452915
3 √n278.23232050675
4 √n68.124869506601
5 √n29.284954035588
2 divisors
τ Total Divisors
2 Total number of the positive divisors of n
σ Sum of Divisors
21538862 Sum of all the positive divisors of n
s Aliquot Sum
1 Sum of the proper positive divisors of n
A Arithmetic Mean
10769431 Returns the sum of divisors (σ(n )) divided by the total number of divisors (τ(n ))
G Geometric Mean
4640.9979530269 Returns the nth root of the product of n divisors
H Harmonic Mean
1.9999999071446 Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 21538861 can be divided by 2 positive divisors.
The sum of these divisors (counting 21538861) is 21538862, the average is 10769431.
Base
System
Value
2
Binary
1010010001010100000101101
3
Ternary
1111112021202121
4
Quaternary
1102022200231
5
Quinary
21003220421
6
Senary
2045352541
8
Octal
122124055
10
Decimal
21538861
12
Duodecimal
7268751
16
Hexadecimal
148a82d
20
Vigesimal
6ec731
36
Base36
ctnhp
md5
7d2768fb2dec10eccd3123ceeb2d82f9
sha1
0fb409828fc8795e618bd4c583ff476a67e2ceec
sha256
8e55d15d3706c284b3ef49363193100b916e40d3e99b76b0c26e97a52992c439
sha512
7013717d5736f38418f1282bc0a26943d25ecf01eac2013e77feac592b79c6eb265b7268baa55619e1bf763c0ca446c306f0c30045a8f9cb66e9c72d935372c7
ripemd-160
93bbd144813ee495674402459de194d8e2c00c18
Diameter
43077722
Circumference
135332654.96858
Area
1.4574556220646E+15
Volume
4.1855912076425E+22
Surface area
5.8298224882586E+15
Circumference
135332654.96858
Perimeter
86155444
Area
463922533177321
Diagonal
30460549.344269
Surface area
2783535199063926
Volume
9.9923629568742E+21
Space diagonal
37306401.589164
Perimeter
64616583
Area
2.0088434955979E+14
Altitude
18653200.794582
Surface area
2.0088434955979E+14
Volume
1.1776112678138E+21
Height
10153516.44809