21253387 is an odd 8-digits composite number following 21253386
and preceding 21253388 . In scientific notation, it is written as 2.1253387 × 10^7.
The sum of its digits is 31. It has a total of 2 prime factors and 4 positive divisors.
There are 21242736 positive integers (up to 21253387) that are relatively prime to 21253387.
21253387 has 4 divisors, whose sum is 21264040
The reverse of 21253387 is 78335212
Previous prime number is 7993
Is Prime? no
Number parity odd
Number length 8
Sum of Digits 31
Digital Root 4
Name
twenty-one million two hundred fifty-three thousand three hundred eighty-seven
Scientific notation
2.1253387 × 10^7
Engineering notation
2.1253387 × 10^6
Prime Factorization
7993 × 2659
Composite number
ω
Distinct Factors
2
Total number of distinct prime factors
Ω
Total Factors
2
Total number of prime factors
rad
Radical
21253387
Product of the distinct prime numbers
The prime factorization of 21253387 is 7993 × 2659.
Since it has a total of 2 prime factors.
8 , 5 , 96 , 84 , 545 , 875 , 3919 , 1371 , 36146 , 88895 , 252360 , 482477 , 7844576 , 4650796 , 28794229 , 68878518 , 500326589 , 534856636 , 2138798799 , 455451448
n×2
42506774
n×3
63760161
n×4
85013548
n×5
106266935
n÷2
10626693.5
n÷3
7084462.3333333
n÷3
5313346.75
n÷5
4250677.4
n2
451706458971769
n3
9.6002921829266E+21
n4
2.0403872507681E+29
n5
4.3365139870441E+36
2 √n
4610.1395857392
3 √n
276.99762799517
4 √n
67.898008702312
5 √n
29.206911187544
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
-21253386
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 21253387 can be divided by 4 positive divisors.
The sum of these divisors (counting 21253387) is 1, the average is 0.25.
Base
System
Value
2
Binary
1010001000100110100001011
3
Ternary
1110222210011111
4
Quaternary
1101010310023
5
Quinary
20420102022
6
Senary
2035311151
8
Octal
121046413
10
Decimal
21253387
12
Duodecimal
714b4b7
16
Hexadecimal
1444d0b
20
Vigesimal
6cgd97
36
Base36
cnj7v
md5
f9667cdc535d923dca6a9867928b2898
sha1
d57bca3faef5ae31c7ed323aecb0dca48f0847d3
sha256
eeb81a3b4d676bb12b9fcef366606e037939b73c935213752bc8cc362969ab54
sha512
60c800d7b093c16572b95a5dd4b54b7cf43f864c64917264c70441da7aa4f2cf30a0f05afaea6eae68bdf24f6f271b9b8cff3c50473a213171370161c820690f
ripemd-160
cc67f8693fdb4f5d161ef958a32b5cdd4666e479
Diameter
42506774
Circumference
133538968.9262
Area
1.4190776930848E+15
Volume
4.021360985893E+22
Surface area
5.6763107723391E+15
Circumference
133538968.9262
Perimeter
85013548
Area
451706458971769
Diagonal
30056828.141764
Surface area
2710238753830614
Volume
9.6002921829266E+21
Space diagonal
36811946.116924
Perimeter
63760161
Area
1.9559463426153E+14
Altitude
18405973.058462
Surface area
1.9559463426153E+14
Volume
1.1314052839866E+21
Height
10018942.713921