225444 has 12 divisors (see below), whose sum is σ = 526064. Its totient is φ = 75144.

The previous prime is 225431. The next prime is 225457. The reversal of 225444 is 444522.

It is an interprime number because it is at equal distance from previous prime (225431) and next prime (225457).

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 225444.

It is an unprimeable number.

225444 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9382 + ... + 9405.

2²²⁵⁴⁴⁴ is an apocalyptic number.

It is an amenable number.

225444 is an abundant number, since it is smaller than the sum of its proper divisors (300620).

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

225444 is a wasteful number, since it uses less digits than its factorization.

225444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18794 (or 18792 counting only the distinct ones).

The product of its digits is 1280, while the sum is 21.

The square root of 225444 is about 474.8094354581. The cubic root of 225444 is about 60.8620010417.

Adding to 225444 its reverse (444522), we get a palindrome (669966).

The spelling of 225444 in words is "two hundred twenty-five thousand, four hundred forty-four".