225664375 has 40 divisors (see below), whose sum is σ = 303990192. Its totient is φ = 166848000.

The previous prime is 225664363. The next prime is 225664379. The reversal of 225664375 is 573466522.

It is not a de Polignac number, because 225664375 - 2¹⁹ = 225140087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225664379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 711717 + ... + 712033.

Almost surely, 2^225664375 is an apocalyptic number.

225664375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

225664375 is a deficient number, since it is larger than the sum of its proper divisors (78325817).

225664375 is an equidigital number, since it uses as much as digits as its factorization.

225664375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421 (or 406 counting only the distinct ones).

The product of its digits is 302400, while the sum is 40.

The square root of 225664375 is about 15022.1295094937. The cubic root of 225664375 is about 608.8182576619.

The spelling of 225664375 in words is "two hundred twenty-five million, six hundred sixty-four thousand, three hundred seventy-five".