225168280 has 16 divisors (see below), whose sum is σ = 506628720. Its totient is φ = 90067296.

The previous prime is 225168257. The next prime is 225168299. The reversal of 225168280 is 82861522.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2814564 + ... + 2814643.

It is an arithmetic number, because the mean of its divisors is an integer number (31664295).

Almost surely, 2^225168280 is an apocalyptic number.

225168280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225168280 is an abundant number, since it is smaller than the sum of its proper divisors (281460440).

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

225168280 is a wasteful number, since it uses less digits than its factorization.

225168280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5629218 (or 5629214 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 225168280 is about 15005.6082849047. The cubic root of 225168280 is about 608.3717933191.

The spelling of 225168280 in words is "two hundred twenty-five million, one hundred sixty-eight thousand, two hundred eighty".