21491881 is an odd 8-digits prime number following 21491880
and preceding 21491882 . In scientific notation, it is written as 2.1491881 × 10^7.
The sum of its digits is 34. It has a total of 1 prime factors and 2 positive divisors.
There are 21491880 positive integers (up to 21491881) that are relatively prime to 21491881.
21491881 has 2 divisors, whose sum is 21491882
The reverse of 21491881 is 18819412
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 four hundred ninety-one thousand eight hundred eighty-one
Scientific notation
2.1491881 × 10^7
Engineering notation
2.1491881 × 10^6
Prime Factorization
21491881
Composite number
ω Distinct Factors
1 Total number of distinct prime factors
Ω Total Factors
1 Total number of prime factors
rad Radical
21491881 Product of the distinct prime numbers
The prime factorization of 21491881 is 21491881.
Since it has a total of 1 prime factors.
7 , 5 , 54 , 66 , 756 , 170 , 3997 , 5060 , 89934 , 52152 , 49145 , 566467 , 5388455 , 6489038 , 17290914 , 89354795 , 703001111 , 618611916 , 563306512 , 6776814431
n×2
42983762
n×3
64475643
n×4
85967524
n×5
107459405
n÷2
10745940.5
n÷3
7163960.3333333
n÷3
5372970.25
n÷5
4298376.2
n2
461900948918161
n3
9.9271202279362E+21
n4
2.133524866115E+29
n5
4.5853462533084E+36
2 √n4635.9336707938
3 √n278.02988223201
4 √n68.087691037322
5 √n29.272167759993
2 divisors
τ Total Divisors
2 Total number of the positive divisors of n
σ Sum of Divisors
21491882 Sum of all the positive divisors of n
s Aliquot Sum
1 Sum of the proper positive divisors of n
A Arithmetic Mean
10745941 Returns the sum of divisors (σ(n )) divided by the total number of divisors (τ(n ))
G Geometric Mean
4635.933778647 Returns the nth root of the product of n divisors
H Harmonic Mean
1.9999999069416 Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 21491881 can be divided by 2 positive divisors.
The sum of these divisors (counting 21491881) is 21491882, the average is 10745941.
Base
System
Value
2
Binary
1010001111111000010101001
3
Ternary
1111102220022121
4
Quaternary
1101333002221
5
Quinary
21000220011
6
Senary
2044351241
8
Octal
121770251
10
Decimal
21491881
12
Duodecimal
7245521
16
Hexadecimal
147f0a9
20
Vigesimal
6e69e1
36
Base36
csn8p
md5
7daf2180e6d52e93db74925b67bf3535
sha1
930430c93413e9779254b3805ca9e4b76c839f6b
sha256
19e32aa91f66271ab933792881bbf86abdf96c0ccc39d657c16a8dd62fa93ace
sha512
939e8346110b7a85abc6c4513acf1fc8332bca487c4b69de2f0d9e92b69de491a9b8979c182a523de630e76b34441b2fea7d039d2dcf4e70fcde7e1ec8de17dd
ripemd-160
14ffad9bebfc4a4562d19189c4d0b76c246bec6b
Diameter
42983762
Circumference
135037470.92285
Area
1.4511046278074E+15
Volume
4.1582623972516E+22
Surface area
5.8044185112298E+15
Circumference
135037470.92285
Perimeter
85967524
Area
461900948918161
Diagonal
30394109.591109
Surface area
2771405693508966
Volume
9.9271202279362E+21
Space diagonal
37225029.842224
Perimeter
64475643
Area
2.0000897789763E+14
Altitude
18612514.921112
Surface area
2.0000897789763E+14
Volume
1.1699223384713E+21
Height
10131369.863703