225643448 has 32 divisors (see below), whose sum is σ = 450003600. Its totient is φ = 105702912.

The previous prime is 225643447. The next prime is 225643463. The reversal of 225643448 is 844346522.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225643447) 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, 27218 + ... + 34526.

Almost surely, 2^225643448 is an apocalyptic number.

It is an amenable number.

225643448 is a deficient number, since it is larger than the sum of its proper divisors (224360152).

225643448 is a wasteful number, since it uses less digits than its factorization.

225643448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7559 (or 7555 counting only the distinct ones).

The product of its digits is 184320, while the sum is 38.

The square root of 225643448 is about 15021.4329542824. The cubic root of 225643448 is about 608.7994374803.

The spelling of 225643448 in words is "two hundred twenty-five million, six hundred forty-three thousand, four hundred forty-eight".