225372828 has 12 divisors (see below), whose sum is σ = 525869960. Its totient is φ = 75124272.

The previous prime is 225372811. The next prime is 225372863. The reversal of 225372828 is 828273522.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9390523 + ... + 9390546.

Almost surely, 2^225372828 is an apocalyptic number.

It is an amenable number.

225372828 is an abundant number, since it is smaller than the sum of its proper divisors (300497132).

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

225372828 is a wasteful number, since it uses less digits than its factorization.

225372828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18781076 (or 18781074 counting only the distinct ones).

The product of its digits is 107520, while the sum is 39.

The square root of 225372828 is about 15012.4224560862. The cubic root of 225372828 is about 608.5559571674. Note that the first 3 decimals are identical.

The spelling of 225372828 in words is "two hundred twenty-five million, three hundred seventy-two thousand, eight hundred twenty-eight".