21491385 is an odd 8-digits composite number following 21491384
and preceding 21491386 . In scientific notation, it is written as 2.1491385 × 10^7.
The sum of its digits is 33. It has a total of 4 prime factors and 16 positive divisors.
There are 11432960 positive integers (up to 21491385) that are relatively prime to 21491385.
21491385 has 16 divisors, whose sum is 34473600
The reverse of 21491385 is 58319412
Previous prime number is 5
Is Prime? no
Number parity odd
Number length 8
Sum of Digits 33
Digital Root 6
Name
twenty-one million four hundred ninety-one thousand three hundred eighty-five
Scientific notation
2.1491385 × 10^7
Engineering notation
2.1491385 × 10^6
Prime Factorization
3 × 449 × 5 × 3191
Composite number
ω
Distinct Factors
4
Total number of distinct prime factors
Ω
Total Factors
4
Total number of prime factors
rad
Radical
21491385
Product of the distinct prime numbers
The prime factorization of 21491385 is 3 × 449 × 5 × 3191.
Since it has a total of 4 prime factors.
4 , 3 , 90 , 63 , 40 , 979 , 281 , 7665 , 49455 , 14061 , 377215 , 881947 , 726468 , 7914005 , 64381041 , 76023922 , 114860867 , 541563049 , 8000165377 , 9297955626
n×2
42982770
n×3
64474155
n×4
85965540
n×5
107456925
n÷2
10745692.5
n÷3
7163795
n÷3
5372846.25
n÷5
4298277
n2
461879629218225
n3
9.9264329351861E+21
n4
2.1333279188676E+29
n5
4.5848171635633E+36
2 √n
4635.8801753281
3 √n
278.02774337963
4 √n
68.087298193775
5 √n
29.272032647303
1 , 3 , 5 , 15 , 449 , 1347 , 2245 , 3191 , 6735 , 9573 , 15955 , 47865 , 1432759 , 4298277 , 7163795 , 21491385
16 divisors
τ
Total Divisors
16
Total number of the positive divisors of n
σ
Sum of Divisors
1
Sum of all the positive divisors of n
s
Aliquot Sum
-21491384
Sum of the proper positive divisors of n
A
Arithmetic Mean
0.0625
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
16
Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 21491385 can be divided by 16 positive divisors.
The sum of these divisors (counting 21491385) is 1, the average is 0.0625.
Base
System
Value
2
Binary
1010001111110111010111001
3
Ternary
1111102212122020
4
Quaternary
1101332322321
5
Quinary
21000211020
6
Senary
2044345053
8
Octal
121767271
10
Decimal
21491385
12
Duodecimal
7245189
16
Hexadecimal
147eeb9
20
Vigesimal
6e6895
36
Base36
csmux
md5
d43610ff28df5d87bb05539012acfe7a
sha1
a8070c26d7701f0fe5d7360fd5d5fffb3475c84e
sha256
ee8d45d9b27fe1c04fd8f59f0f2700e784dcec365d396a48132be528653ab420
sha512
cb232c11745ae259453f5a7e622ea18be3bc4ac665f5cdea1b056624221541214b8037d3344724e60bf34296b10d2f7b51bd2be647689bae503d3c05547d3f40
ripemd-160
8bd57b36cf58cf501bc41180bfb4ca26c776f7b6
Diameter
42982770
Circumference
135034354.46294
Area
1.4510376499948E+15
Volume
4.1579745047377E+22
Surface area
5.804150599979E+15
Circumference
135034354.46294
Perimeter
85965540
Area
461879629218225
Diagonal
30393408.141182
Surface area
2771277775309350
Volume
9.9264329351861E+21
Space diagonal
37224170.745024
Perimeter
64474155
Area
1.9999974619676E+14
Altitude
18612085.372512
Surface area
1.9999974619676E+14
Volume
1.1698413402439E+21
Height
10131136.047061