225421444 has 48 divisors (see below), whose sum is σ = 415457280. Its totient is φ = 106928640.

The previous prime is 225421439. The next prime is 225421451. The reversal of 225421444 is 444124522.

225421444 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1645344 + ... + 1645480.

It is an arithmetic number, because the mean of its divisors is an integer number (8655360).

Almost surely, 2^225421444 is an apocalyptic number.

It is an amenable number.

225421444 is a deficient number, since it is larger than the sum of its proper divisors (190035836).

225421444 is a wasteful number, since it uses less digits than its factorization.

225421444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388 (or 386 counting only the distinct ones).

The product of its digits is 10240, while the sum is 28.

The square root of 225421444 is about 15014.0415611520. The cubic root of 225421444 is about 608.5997119678.

Adding to 225421444 its reverse (444124522), we get a palindrome (669545966).

The spelling of 225421444 in words is "two hundred twenty-five million, four hundred twenty-one thousand, four hundred forty-four".