# Wanna square up?!

How many 16-digit integers are there such that the sum of the square of their digits is a square?

Examples And Test Cases

• $$2283$$ is a $$4$$-digit integer such that the sum of the square of its digits is a square. $$2^2 + 2^2 + 8^2 + 3^2 = 81 = 9^2$$.

• There are $$332$$ $$4$$-digit integers with the required property.

×