155661921 is an odd 9-digits composite number following 155661920
and preceding 155661922 . In scientific notation, it is written as 1.55661921 × 10^8.
The sum of its digits is 36. It has a total of 2 prime factors and 4 positive divisors.
There are 103774608 positive integers (up to 155661921) that are relatively prime to 155661921.
155661921 has 4 divisors, whose sum is 172957700
The reverse of 155661921 is 129166551
Previous prime number is 9
Is Prime? no
Number parity odd
Number length 9
Sum of Digits 36
Digital Root 9
Name
one hundred fifty-five million six hundred sixty-one thousand nine hundred twenty-one
Scientific notation
1.55661921 × 10^8
Engineering notation
1.55661921 × 10^6
Prime Factorization
9 × 17295769
Composite number
ω
Distinct Factors
2
Total number of distinct prime factors
Ω
Total Factors
2
Total number of prime factors
rad
Radical
155661921
Product of the distinct prime numbers
The prime factorization of 155661921 is 9 × 17295769.
Since it has a total of 2 prime factors.
6 , 5 , 29 , 85 , 863 , 792 , 2786 , 2897 , 5893 , 92321 , 907099 , 962868 , 8742 , 9069307 , 6281344 , 66412799 , 999314690 , 159423034 , 2687349085 , 7175130539
n×2
311323842
n×3
466985763
n×4
622647684
n×5
778309605
n÷2
77830960.5
n÷3
51887307
n÷3
38915480.25
n÷5
31132384.2
n2
24230633649410241
n3
3.7717869809144E+24
n4
5.8712360705193E+32
n5
9.1392788538153E+40
2 √n
12476.454664687
3 √n
537.9321014997
4 √n
111.6980513021
5 √n
43.494713765753
4 divisors
τ
Total Divisors
4
Total number of the positive divisors of n
σ
Sum of Divisors
1
Sum of all the positive divisors of n
s
Aliquot Sum
-155661920
Sum of the proper positive divisors of n
A
Arithmetic Mean
0.25
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
4
Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 155661921 can be divided by 4 positive divisors.
The sum of these divisors (counting 155661921) is 1, the average is 0.25.
Base
System
Value
2
Binary
1001010001110011011001100001
3
Ternary
101211220110000100
4
Quaternary
21101303121201
5
Quinary
304322140141
6
Senary
23240213013
8
Octal
1121633141
10
Decimal
155661921
12
Duodecimal
4416a169
16
Hexadecimal
9473661
20
Vigesimal
28cheg1
36
Base36
2kodi9
md5
8b70ec1426445744dcad46f6c088c076
sha1
df5233e8422b506beaa56f2482d1bd537dcd3c30
sha256
175901e4231418994b008e6da1332624cde15c469f4cea35afc3010101709aae
sha512
03991926462ab16d50dfcbd90ef2619dba331d4d013a560c15cb77fd3de4e4117fb25ca7695f96b093a4fe9221187cdb702c764e497fdd4fff50a08d6141d82b
ripemd-160
6e5a6a7cd47b3c3c0bfc3d86c634d29227a40b1c
Diameter
311323842
Circumference
978052694.91455
Area
7.6122780664813E+16
Volume
1.5799224360195E+25
Surface area
3.0449112265925E+17
Circumference
978052694.91455
Perimeter
622647684
Area
24230633649410241
Diagonal
220139199.82325
Surface area
145383801896461446
Volume
3.7717869809144E+24
Space diagonal
269614355.97577
Perimeter
466985763
Area
1.0492172145092E+16
Altitude
134807177.98789
Surface area
1.0492172145092E+16
Volume
4.4450935856596E+23
Height
73379733.274416