225220444 has 12 divisors (see below), whose sum is σ = 394337104. Its totient is φ = 112552704.

The previous prime is 225220441. The next prime is 225220459. The reversal of 225220444 is 444022522.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225220441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4872 + ... + 21775.

Almost surely, 2^225220444 is an apocalyptic number.

It is an amenable number.

225220444 is a deficient number, since it is larger than the sum of its proper divisors (169116660).

225220444 is a wasteful number, since it uses less digits than its factorization.

225220444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28764 (or 28762 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 25.

The square root of 225220444 is about 15007.3463343790. The cubic root of 225220444 is about 608.4187695272.

Adding to 225220444 its reverse (444022522), we get a palindrome (669242966).

The spelling of 225220444 in words is "two hundred twenty-five million, two hundred twenty thousand, four hundred forty-four".