21531947 is an odd 8-digits prime number following 21531946
and preceding 21531948 . In scientific notation, it is written as 2.1531947 × 10^7.
The sum of its digits is 32. It has a total of 1 prime factors and 2 positive divisors.
There are 21531946 positive integers (up to 21531947) that are relatively prime to 21531947.
21531947 has 2 divisors, whose sum is 21531948
The reverse of 21531947 is 74913512
Previous prime number is 1
Is Prime? yes Number parity odd Number length 8 Sum of Digits 32 Digital Root 5
Name
twenty-one million five hundred thirty-one thousand nine hundred forty-seven
Scientific notation
2.1531947 × 10^7
Engineering notation
2.1531947 × 10^6
Prime Factorization
21531947
Composite number
ω Distinct Factors
1 Total number of distinct prime factors
Ω Total Factors
1 Total number of prime factors
rad Radical
21531947 Product of the distinct prime numbers
The prime factorization of 21531947 is 21531947.
Since it has a total of 1 prime factors.
9 , 7 , 72 , 53 , 289 , 375 , 5239 , 7629 , 44673 , 8343 , 617627 , 62120 , 8668154 , 8773980 , 31708801 , 86919448 , 560559896 , 92258521 , 7984811458 , 5654149452
n×2
43063894
n×3
64595841
n×4
86127788
n×5
107659735
n÷2
10765973.5
n÷3
7177315.6666667
n÷3
5382986.75
n÷5
4306389.4
n2
463624741610809
n3
9.9827433642526E+21
n4
2.1494790103369E+29
n5
4.6282468128186E+36
2 √n4640.2529025905
3 √n278.20254635207
4 √n68.119401807345
5 √n29.28307369312
2 divisors
τ Total Divisors
2 Total number of the positive divisors of n
σ Sum of Divisors
21531948 Sum of all the positive divisors of n
s Aliquot Sum
1 Sum of the proper positive divisors of n
A Arithmetic Mean
10765974 Returns the sum of divisors (σ(n )) divided by the total number of divisors (τ(n ))
G Geometric Mean
4640.2530103433 Returns the nth root of the product of n divisors
H Harmonic Mean
1.9999999071148 Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 21531947 can be divided by 2 positive divisors.
The sum of these divisors (counting 21531947) is 21531948, the average is 10765974.
Base
System
Value
2
Binary
1010010001000110100101011
3
Ternary
1111111221021112
4
Quaternary
1102020310223
5
Quinary
21003010242
6
Senary
2045300535
8
Octal
122106453
10
Decimal
21531947
12
Duodecimal
726474b
16
Hexadecimal
1488d2b
20
Vigesimal
6eb9h7
36
Base36
cti5n
md5
d866bc9d878b765ba015ea2ad42c6105
sha1
e76f27b65f8cd1274f521a3aefc8e502a73f5dcf
sha256
e0af96e05919c085398e2c7993c42a432de5f665c6a16d2165fde73a45dd9096
sha512
d05d5ca61a1629d15658a0398d85e52cc804d6d54e82efa3ec686c7158f5910b598581e9d043f5ebe4227a1211558e3833e0709284b4db9813e6ac8dcf90019d
ripemd-160
3d42c88c9f940d760930d10d2ef50e22f984540f
Diameter
43063894
Circumference
135289213.02537
Area
1.456520082267E+15
Volume
4.1815617621078E+22
Surface area
5.8260803290679E+15
Circumference
135289213.02537
Perimeter
86127788
Area
463624741610809
Diagonal
30450771.471699
Surface area
2781748449664854
Volume
9.9827433642526E+21
Space diagonal
37294426.18988
Perimeter
64595841
Area
2.0075540202898E+14
Altitude
18647213.09494
Surface area
2.0075540202898E+14
Volume
1.1764775879513E+21
Height
10150257.157233