Is 22 a square number explain?

No. A square number is a number that is the result of multiplying a number by itself.

I.e. 1x1=1, 2x2=4, 3x3=9, 4x4=16, 5x5=25

1,4,9,16,25 are the first 5 square numbers. 22's factors are 1x22 & 2x11 so it is not a square number v