21497978 is an even 8-digits composite number following 21497977
and preceding 21497979 . In scientific notation, it is written as 2.1497978 × 10^7.
The sum of its digits is 47. It has a total of 3 prime factors and 8 positive divisors.
There are 10702624 positive integers (up to 21497978) that are relatively prime to 21497978.
21497978 has 8 divisors, whose sum is 32386068
The reverse of 21497978 is 87979412
Previous prime number is 233
Is Prime? no
Number parity even
Number length 8
Sum of Digits 47
Digital Root 2
Name
twenty-one million four hundred ninety-seven thousand nine hundred seventy-eight
Scientific notation
2.1497978 × 10^7
Engineering notation
2.1497978 × 10^6
Prime Factorization
2 × 233 × 46133
Composite number
ω
Distinct Factors
3
Total number of distinct prime factors
Ω
Total Factors
3
Total number of prime factors
rad
Radical
21497978
Product of the distinct prime numbers
The prime factorization of 21497978 is 2 × 233 × 46133.
Since it has a total of 3 prime factors.
4 , 10 , 78 , 46 , 703 , 115 , 7656 , 8027 , 59557 , 31869 , 64151 , 270539 , 9690405 , 2275287 , 81997730 , 6744848 , 167123458 , 549663114 , 3924161829 , 8402712522
n×2
42995956
n×3
64493934
n×4
85991912
n×5
107489890
n÷2
10748989
n÷3
7165992.6666667
n÷3
5374494.5
n÷5
4299595.6
n2
462163058088484
n3
9.935571255199E+21
n4
2.135946922617E+29
n5
4.5918539951588E+36
2 √n
4636.5912047538
3 √n
278.05617104186
4 √n
68.092519447835
5 √n
29.273828407175
8 divisors
τ
Total Divisors
8
Total number of the positive divisors of n
σ
Sum of Divisors
1
Sum of all the positive divisors of n
s
Aliquot Sum
-21497977
Sum of the proper positive divisors of n
A
Arithmetic Mean
0.125
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
8
Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 21497978 can be divided by 8 positive divisors.
The sum of these divisors (counting 21497978) is 1, the average is 0.125.
Base
System
Value
2
Binary
1010010000000100001111010
3
Ternary
1111110012200102
4
Quaternary
1102000201322
5
Quinary
21000413403
6
Senary
2044435402
8
Octal
122004172
10
Decimal
21497978
12
Duodecimal
7248b62
16
Hexadecimal
148087a
20
Vigesimal
6e74ii
36
Base36
csry2
md5
1453d9d4d1161c6eba8128d74ecf62ae
sha1
400f713286a2f7f6e004724ad4af43d64dd9058e
sha256
9d6ca0392e2c57c3f1adde9a64fcf2c0ed917290271e8e200b12231f2b78e5bf
sha512
8121975e3e65fcd68dd8ef5c8360aabaef763c6e1e219f315630a2fb6eb483f4eb6a7037f708c0024578d6ff3a225bc707fb5e007a0c44e751d73921618d0714
ripemd-160
ae6fc11933b7d9f869a3204201189678a0fbde9c
Diameter
42995956
Circumference
135075779.50367
Area
1.4519280680514E+15
Volume
4.1618023552735E+22
Surface area
5.8077122722055E+15
Circumference
135075779.50367
Perimeter
85991912
Area
462163058088484
Diagonal
30402732.051198
Surface area
2772978348530904
Volume
9.935571255199E+21
Space diagonal
37235590.155998
Perimeter
64493934
Area
2.0012247449767E+14
Altitude
18617795.077999
Surface area
2.0012247449767E+14
Volume
1.1709183015856E+21
Height
10134244.017066