225640 has 16 divisors (see below), whose sum is σ = 507780. Its totient is φ = 90240.

The previous prime is 225637. The next prime is 225671. The reversal of 225640 is 46522.

225640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 209764 + 15876 = 458^2 + 126^2 .

It is a plaindrome in base 11.

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, 2781 + ... + 2860.

2²²⁵⁶⁴⁰ is an apocalyptic number.

225640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225640 is an abundant number, since it is smaller than the sum of its proper divisors (282140).

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

225640 is a wasteful number, since it uses less digits than its factorization.

225640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5652 (or 5648 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 225640 is about 475.0157892113. The cubic root of 225640 is about 60.8796336495.

The spelling of 225640 in words is "two hundred twenty-five thousand, six hundred forty".