225217404 has 36 divisors (see below), whose sum is σ = 570390184. Its totient is φ = 74928672.

The previous prime is 225217381. The next prime is 225217423. The reversal of 225217404 is 404712522.

225217404 is a `hidden beast` number, since 2 + 252 + 1 + 7 + 404 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13974 + ... + 25410.

Almost surely, 2^225217404 is an apocalyptic number.

It is an amenable number.

225217404 is an abundant number, since it is smaller than the sum of its proper divisors (345172780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

225217404 is a wasteful number, since it uses less digits than its factorization.

225217404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11994 (or 11989 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 225217404 is about 15007.2450503082. The cubic root of 225217404 is about 608.4160320590.

Adding to 225217404 its reverse (404712522), we get a palindrome (629929926).

The spelling of 225217404 in words is "two hundred twenty-five million, two hundred seventeen thousand, four hundred four".