655 is an odd 3-digits composite number following 654
and preceding 656 . In scientific notation, it is written as 6.55 × 10^2.
The sum of its digits is 16. It has a total of 2 prime factors and 4 positive divisors.
There are 520 positive integers (up to 655) that are relatively prime to 655.
655 has 4 divisors, whose sum is 792
The reverse of 655 is 556
Previous prime number is 131
Is Prime? no
Number parity odd
Number length 3
Sum of Digits 16
Digital Root 7
Name
six hundred fifty-five
Scientific notation
6.55 × 10^2
Engineering notation
6.55 × 10^0
Prime Factorization
131 × 5
Composite number
ω
Distinct Factors
2
Total number of distinct prime factors
Ω
Total Factors
2
Total number of prime factors
rad
Radical
655
Product of the distinct prime numbers
The prime factorization of 655 is 131 × 5.
Since it has a total of 2 prime factors.
7 , 2 , 5 , 73 , 110 , 887 , 7816 , 4320 , 82830 , 90949 , 916194 , 91942 , 6215119 , 2330539 , 43655201 , 17234573 , 568782884 , 829879498 , 9904520391 , 8699224849
n×2
1310
n×3
1965
n×4
2620
n×5
3275
n÷2
327.5
n÷3
218.33333333333
n÷3
163.75
n÷5
131
n2
429025
n3
281011375
n4
184062450625
n5
120560905159375
2 √n
25.592967784139
3 √n
8.6845456027172
4 √n
5.0589492766917
5 √n
3.6580383988069
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
-654
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 655 can be divided by 4 positive divisors.
The sum of these divisors (counting 655) is 1, the average is 0.25.
Base
System
Value
2
Binary
1010001111
3
Ternary
220021
4
Quaternary
22033
5
Quinary
10110
6
Senary
3011
8
Octal
1217
10
Decimal
655
12
Duodecimal
467
16
Hexadecimal
28f
20
Vigesimal
1cf
36
Base36
i7
md5
3d2d8ccb37df977cb6d9da15b76c3f3a
sha1
4dcee7f85df40fc71dcad450a6cbc55190e1253b
sha256
9f6cb78c09b22a1a10564f6be4a1784327a42ff11a10a31d355435db59f44710
sha512
dcfb386de7b5e6569b10eb9d3095af2265387ac67923d0cb8c39200a91cf5c8570a4a865657312ba53d129972a583a969801d7bca953620769313923b8dbe97c
ripemd-160
5ee04b7f699aa028652c28787b32f69090831f1a
Diameter
1310
Circumference
4115.4863762026
Area
1347821.7882064
Volume
1177097695.0336
Surface area
5391287.1528254
Circumference
4115.4863762026
Perimeter
2620
Area
429025
Diagonal
926.30988335438
Surface area
2574150
Volume
281011375
Space diagonal
1134.4932789576
Perimeter
1965
Area
185773.27442931
Altitude
567.24663947881
Surface area
185773.27442931
Volume
33117508.142176
Height
308.76996111813