Divide it by 5 is a possibility because 55/5 = 11
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Odd number
61
55 is odd. All numbers ending in five are odd.
A Kaprekar number is a number whose square can be split into two parts whose sum is the the original number. Both parts must be positive.For example, 55^2 = 3025 and 30+25 = 55.This is an example in base 10. Kaprekar also defined his number for other bases.
55 is not a prime number because you can do 5*11=55. The definition of a prime number is a number that has only the factors of 1 and itself. Because 55 has 1*55-55 AND 5*11=55 it is not a prime number. Hope that helps!!