Number Gossip

(Enter a number and I'll tell you everything you wanted to know about it but were afraid to ask.)

Unique Properties of 225

  • 225 is the smallest square that starts with 2 identical digits
  • 225 is the smallest octagonal square (except trivial 1)
  • 225 is the smallest square whose external digits form a square and whose internal digits form a prime
  • 225 is the only three-digit square with all prime digits

Rare Properties of 225

Square

Common Properties of 225

Composite
Deficient
Evil
Odd
Powerful