225521644 has 12 divisors (see below), whose sum is σ = 395323768. Its totient is φ = 112572000.

The previous prime is 225521633. The next prime is 225521687. The reversal of 225521644 is 446125522.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44502 + ... + 49309.

Almost surely, 2^225521644 is an apocalyptic number.

It is an amenable number.

225521644 is a deficient number, since it is larger than the sum of its proper divisors (169802124).

225521644 is a wasteful number, since it uses less digits than its factorization.

225521644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94416 (or 94414 counting only the distinct ones).

The product of its digits is 19200, while the sum is 31.

The square root of 225521644 is about 15017.3780667599. The cubic root of 225521644 is about 608.6898729522.

The spelling of 225521644 in words is "two hundred twenty-five million, five hundred twenty-one thousand, six hundred forty-four".