225804 has 24 divisors (see below), whose sum is σ = 544768. Its totient is φ = 72720.

The previous prime is 225781. The next prime is 225809. The reversal of 225804 is 408522.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69 + ... + 675.

2²²⁵⁸⁰⁴ is an apocalyptic number.

It is an amenable number.

225804 is an abundant number, since it is smaller than the sum of its proper divisors (318964).

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

225804 is a wasteful number, since it uses less digits than its factorization.

225804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645 (or 643 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 225804 is about 475.1883836964. The cubic root of 225804 is about 60.8943796194.

The spelling of 225804 in words is "two hundred twenty-five thousand, eight hundred four".