225118520 has 32 divisors (see below), whose sum is σ = 552564720. Its totient is φ = 81861120.

The previous prime is 225118519. The next prime is 225118541. The reversal of 225118520 is 25811522.

It is a self number, because there is not a number n which added to its sum of digits gives 225118520.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 255377 + ... + 256256.

Almost surely, 2^225118520 is an apocalyptic number.

225118520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225118520 is an abundant number, since it is smaller than the sum of its proper divisors (327446200).

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

225118520 is a wasteful number, since it uses less digits than its factorization.

225118520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511655 (or 511651 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 225118520 is about 15003.9501465447. The cubic root of 225118520 is about 608.3269752677.

The spelling of 225118520 in words is "two hundred twenty-five million, one hundred eighteen thousand, five hundred twenty".