21891421 is an odd 8-digits prime number following 21891420
and preceding 21891422 . In scientific notation, it is written as 2.1891421 × 10^7.
The sum of its digits is 28. It has a total of 1 prime factors and 2 positive divisors.
There are 21891420 positive integers (up to 21891421) that are relatively prime to 21891421.
21891421 has 2 divisors, whose sum is 21891422
The reverse of 21891421 is 12419812
Previous prime number is 1
Is Prime? yes Number parity odd Number length 8 Sum of Digits 28 Digital Root 1
Name
twenty-one million eight hundred ninety-one thousand four hundred twenty-one
Scientific notation
2.1891421 × 10^7
Engineering notation
2.1891421 × 10^6
Prime Factorization
21891421
Composite number
ω Distinct Factors
1 Total number of distinct prime factors
Ω Total Factors
1 Total number of prime factors
rad Radical
21891421 Product of the distinct prime numbers
The prime factorization of 21891421 is 21891421.
Since it has a total of 1 prime factors.
7 , 5 , 56 , 16 , 997 , 409 , 4497 , 4052 , 26099 , 47751 , 112544 , 791140 , 8475535 , 4474899 , 99598555 , 52557353 , 564662276 , 362732612 , 5895863764 , 752408769
n×2
43782842
n×3
65674263
n×4
87565684
n×5
109457105
n÷2
10945710.5
n÷3
7297140.3333333
n÷3
5472855.25
n÷5
4378284.2
n2
479234313399241
n3
1.0491120112269E+22
n4
2.2966552713924E+29
n5
5.0277047437921E+36
2 √n4678.8268828842
3 √n279.74219893523
4 √n68.401950870456
5 √n29.380202893986
2 divisors
τ Total Divisors
2 Total number of the positive divisors of n
σ Sum of Divisors
21891422 Sum of all the positive divisors of n
s Aliquot Sum
1 Sum of the proper positive divisors of n
A Arithmetic Mean
10945711 Returns the sum of divisors (σ(n )) divided by the total number of divisors (τ(n ))
G Geometric Mean
4678.8269897486 Returns the nth root of the product of n divisors
H Harmonic Mean
1.99999990864 Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 21891421 can be divided by 2 positive divisors.
The sum of these divisors (counting 21891421) is 21891422, the average is 10945711.
Base
System
Value
2
Binary
1010011100000100101011101
3
Ternary
1112012012101101
4
Quaternary
1103200211131
5
Quinary
21101011141
6
Senary
2101113101
8
Octal
123404535
10
Decimal
21891421
12
Duodecimal
73b8791
16
Hexadecimal
14e095d
20
Vigesimal
6gg8b1
36
Base36
d17j1
md5
723fed3453cd142121542a5b7070a130
sha1
b3e785c8ab8a7444ff49abcb2ac45113ee7c6566
sha256
8a726e0f8c72a0f8232e47ed26137ea2e5fe4e99d406fdadca3d6b0ed8be6bd3
sha512
282fb5a4239fff18ac8425f2eb48c6e6b7a04e7176a783f7a6a014cedbd529163aaaafe35b1e84c7440bb02b349e2784383fc7e3a133624e24be6d2edad5cb1c
ripemd-160
9adac39bba6bcaeb95ca3f80ae8847b4b866e743
Diameter
43782842
Circumference
137547854.78048
Area
1.5055589983232E+15
Volume
4.3945101163509E+22
Surface area
6.0222359932928E+15
Circumference
137547854.78048
Perimeter
87565684
Area
479234313399241
Diagonal
30959144.477819
Surface area
2875405880395446
Volume
1.0491120112269E+22
Space diagonal
37917053.42188
Perimeter
65674263
Area
2.0751454488447E+14
Altitude
18958526.71094
Surface area
2.0751454488447E+14
Volume
1.2363903622713E+21
Height
10319714.82594