225031636 has 24 divisors (see below), whose sum is σ = 398780424. Its totient is φ = 111100800.

The previous prime is 225031621. The next prime is 225031727. The reversal of 225031636 is 636130522.

It can be written as a sum of positive squares in 4 ways, for example, as 16402500 + 208629136 = 4050^2 + 14444^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 263386 + ... + 264238.

It is an arithmetic number, because the mean of its divisors is an integer number (16615851).

Almost surely, 2^225031636 is an apocalyptic number.

It is an amenable number.

225031636 is a deficient number, since it is larger than the sum of its proper divisors (173748788).

225031636 is a wasteful number, since it uses less digits than its factorization.

225031636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611 (or 1609 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 225031636 is about 15001.0544962679. The cubic root of 225031636 is about 608.2487043758.

The spelling of 225031636 in words is "two hundred twenty-five million, thirty-one thousand, six hundred thirty-six".