Original Resolution: 750×1000
15 Years Old Square Root Of 225 15th Birthday Design Poster By The Elements Redbubble Yes, 225 is a deficient number, that is to say 225 is a natural number that is strictly larger than the sum of its proper divisors, i.e., the divisors of 225 without 225 itself (that is 1 + 3 + 5 + 9 + 15 + 25 + 45 + 75 therefore, the square root of 225 is an integer, and as a consequence 225 is a perfect square.
