225660 has 24 divisors (see below), whose sum is σ = 632016. Its totient is φ = 60160.

The previous prime is 225637. The next prime is 225671. The reversal of 225660 is 66522.

It is a nialpdrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1821 + ... + 1940.

It is an arithmetic number, because the mean of its divisors is an integer number (26334).

2²²⁵⁶⁶⁰ is an apocalyptic number.

225660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225660 is an abundant number, since it is smaller than the sum of its proper divisors (406356).

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

225660 is a wasteful number, since it uses less digits than its factorization.

225660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3773 (or 3771 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 225660 is about 475.0368406766. The cubic root of 225660 is about 60.8814323210.

The spelling of 225660 in words is "two hundred twenty-five thousand, six hundred sixty".