225561772 has 6 divisors (see below), whose sum is σ = 394733108. Its totient is φ = 112780884.

The previous prime is 225561737. The next prime is 225561773. The reversal of 225561772 is 277165522.

225561772 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×225561772² = 101756225975559968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (225561773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28195218 + ... + 28195225.

Almost surely, 2^225561772 is an apocalyptic number.

It is an amenable number.

225561772 is a deficient number, since it is larger than the sum of its proper divisors (169171336).

225561772 is a wasteful number, since it uses less digits than its factorization.

225561772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56390447 (or 56390445 counting only the distinct ones).

The product of its digits is 58800, while the sum is 37.

The square root of 225561772 is about 15018.7140594659. The cubic root of 225561772 is about 608.7259730477.

The spelling of 225561772 in words is "two hundred twenty-five million, five hundred sixty-one thousand, seven hundred seventy-two".