21931387 is an odd 8-digits prime number following 21931386
and preceding 21931388 . In scientific notation, it is written as 2.1931387 × 10^7.
The sum of its digits is 34. It has a total of 1 prime factors and 2 positive divisors.
There are 21931386 positive integers (up to 21931387) that are relatively prime to 21931387.
21931387 has 2 divisors, whose sum is 21931388
The reverse of 21931387 is 78313912
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 nine hundred thirty-one thousand three hundred eighty-seven
Scientific notation
2.1931387 × 10^7
Engineering notation
2.1931387 × 10^6
Prime Factorization
21931387
Composite number
ω Distinct Factors
1 Total number of distinct prime factors
Ω Total Factors
1 Total number of prime factors
rad Radical
21931387 Product of the distinct prime numbers
The prime factorization of 21931387 is 21931387.
Since it has a total of 1 prime factors.
2 , 6 , 98 , 33 , 827 , 414 , 565 , 5949 , 74873 , 87783 , 26306 , 20417 , 5755884 , 9915078 , 88862260 , 49559101 , 411153867 , 995979897 , 6345420448 , 7605163761
n×2
43862774
n×3
65794161
n×4
87725548
n×5
109656935
n÷2
10965693.5
n÷3
7310462.3333333
n÷3
5482846.75
n÷5
4386277.4
n2
480985735743769
n3
1.0548684312076E+22
n4
2.3134727798897E+29
n5
5.0737666849728E+36
2 √n4683.0958777287
3 √n279.91233224805
4 √n68.433148968382
5 √n29.390922642608
2 divisors
τ Total Divisors
2 Total number of the positive divisors of n
σ Sum of Divisors
21931388 Sum of all the positive divisors of n
s Aliquot Sum
1 Sum of the proper positive divisors of n
A Arithmetic Mean
10965694 Returns the sum of divisors (σ(n )) divided by the total number of divisors (τ(n ))
G Geometric Mean
4683.0959844957 Returns the nth root of the product of n divisors
H Harmonic Mean
1.9999999088065 Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 21931387 can be divided by 2 positive divisors.
The sum of these divisors (counting 21931387) is 21931388, the average is 10965694.
Base
System
Value
2
Binary
1010011101010010101111011
3
Ternary
1112021020012121
4
Quaternary
1103222111323
5
Quinary
21103301022
6
Senary
2102022111
8
Octal
123522573
10
Decimal
21931387
12
Duodecimal
7417937
16
Hexadecimal
14ea57b
20
Vigesimal
6h1897
36
Base36
d22d7
md5
2251e3fe8e28847d058a1bfbf59a1ae8
sha1
a852b57d4cf1e063692d65bb65a04a7e559dc399
sha256
3c225db3a3544c30647b02b21a7ab3782c9f137b1da60d67f13dadbc0ffd82d3
sha512
872177ea00b16cbed750109c58c89e5561d233672a4d102fce82c881f1715dc55539231c80da6a58213b080d6de2280588f994d9763dc89ced8aa1879b2807de
ripemd-160
ac090444aaeb3453e8682f1c74e25f9cb2f345c5
Diameter
43862774
Circumference
137798968.56447
Area
1.5110612538941E+15
Volume
4.4186225519809E+22
Surface area
6.0442450155764E+15
Circumference
137798968.56447
Perimeter
87725548
Area
480985735743769
Diagonal
31015664.937053
Surface area
2885914414462614
Volume
1.0548684312076E+22
Space diagonal
37986276.564456
Perimeter
65794161
Area
2.0827293300603E+14
Altitude
18993138.282228
Surface area
2.0827293300603E+14
Volume
1.2431743682776E+21
Height
10338554.979018