225618 has 16 divisors (see below), whose sum is σ = 466176. Its totient is φ = 72720.

The previous prime is 225613. The next prime is 225619. The reversal of 225618 is 816522.

225618 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (225611) by changing a digit.

225618 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 421 + ... + 792.

It is an arithmetic number, because the mean of its divisors is an integer number (29136).

2²²⁵⁶¹⁸ is an apocalyptic number.

225618 is an abundant number, since it is smaller than the sum of its proper divisors (240558).

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

225618 is a wasteful number, since it uses less digits than its factorization.

225618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249.

The product of its digits is 960, while the sum is 24.

The square root of 225618 is about 474.9926315218. The cubic root of 225618 is about 60.8776549881.

The spelling of 225618 in words is "two hundred twenty-five thousand, six hundred eighteen".