21861187 is an odd 8-digits prime number following 21861186
and preceding 21861188 . In scientific notation, it is written as 2.1861187 × 10^7.
The sum of its digits is 34. It has a total of 1 prime factors and 2 positive divisors.
There are 21861186 positive integers (up to 21861187) that are relatively prime to 21861187.
21861187 has 2 divisors, whose sum is 21861188
The reverse of 21861187 is 78116812
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 eight hundred sixty-one thousand one hundred eighty-seven
Scientific notation
2.1861187 × 10^7
Engineering notation
2.1861187 × 10^6
Prime Factorization
21861187
Composite number
ω Distinct Factors
1 Total number of distinct prime factors
Ω Total Factors
1 Total number of prime factors
rad Radical
21861187 Product of the distinct prime numbers
The prime factorization of 21861187 is 21861187.
Since it has a total of 1 prime factors.
5 , 2 , 8 , 63 , 100 , 264 , 6640 , 8850 , 17025 , 56433 , 266587 , 49509 , 875794 , 3878774 , 50241487 , 41934772 , 210316064 , 885448743 , 8351609926 , 8881029006
n×2
43722374
n×3
65583561
n×4
87444748
n×5
109305935
n÷2
10930593.5
n÷3
7287062.3333333
n÷3
5465296.75
n÷5
4372237.4
n2
477911497048969
n3
1.0447712606437E+22
n4
2.2839939901159E+29
n5
4.9930819724799E+36
2 √n4675.5948284684
3 √n279.61335664801
4 √n68.378321334092
5 √n29.372083072259
2 divisors
τ Total Divisors
2 Total number of the positive divisors of n
σ Sum of Divisors
21861188 Sum of all the positive divisors of n
s Aliquot Sum
1 Sum of the proper positive divisors of n
A Arithmetic Mean
10930594 Returns the sum of divisors (σ(n )) divided by the total number of divisors (τ(n ))
G Geometric Mean
4675.5949354066 Returns the nth root of the product of n divisors
H Harmonic Mean
1.9999999085137 Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 21861187 can be divided by 2 positive divisors.
The sum of these divisors (counting 21861187) is 21861188, the average is 10930594.
Base
System
Value
2
Binary
1010011011001001101000011
3
Ternary
1112010122220121
4
Quaternary
1103121031003
5
Quinary
21044024222
6
Senary
2100321111
8
Octal
123311503
10
Decimal
21861187
12
Duodecimal
73a3197
16
Hexadecimal
14d9343
20
Vigesimal
6gccj7
36
Base36
d0k77
md5
2a8ce990719c4cdcd392915e000f85b6
sha1
d43d9df556dcc453641640a33a779414eb206ea3
sha256
d2bc718f864ef24e9288f38be5fe108399f37755063c4949f2501e34d2a32042
sha512
3b5fb8b4ff19295600b66fc4d4b040b3a83665753ee5138aa059daf200979b2df9fc7ad257e4292686445dd8b61238edd8312c7f1bd1d5e0f4f4572e976c2b5e
ripemd-160
4cf65ca99451cfbb17501d2e26f00e92215194cb
Diameter
43722374
Circumference
137357888.95591
Area
1.5014032481951E+15
Volume
4.3763276228269E+22
Surface area
6.0056129927806E+15
Circumference
137357888.95591
Perimeter
87444748
Area
477911497048969
Diagonal
30916387.144974
Surface area
2867468982293814
Volume
1.0447712606437E+22
Space diagonal
37864686.597764
Perimeter
65583561
Area
2.0694174860253E+14
Altitude
18932343.298882
Surface area
2.0694174860253E+14
Volume
1.23127473865E+21
Height
10305462.381658