SOLUTION: how to determine if the number 5240365220553 is a square number

Question 427617: how to determine if the number 5240365220553 is a square number
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Square numbers end in 0, 1, 4, 5, 6 or 9.
This is not one, its LS digit is 3.