225806 has 12 divisors (see below), whose sum is σ = 390168. Its totient is φ = 96012.

The previous prime is 225781. The next prime is 225809. The reversal of 225806 is 608522.

It is a happy number.

225806 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 225806.

It is not an unprimeable number, because it can be changed into a prime (225809) by changing a digit.

225806 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 5 ways as a sum of consecutive naturals, for example, 1715 + ... + 1841.

It is an arithmetic number, because the mean of its divisors is an integer number (32514).

2²²⁵⁸⁰⁶ is an apocalyptic number.

225806 is a deficient number, since it is larger than the sum of its proper divisors (164362).

225806 is an equidigital number, since it uses as much as digits as its factorization.

225806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263 (or 136 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 225806 is about 475.1904881203. The cubic root of 225806 is about 60.8945594042.

The spelling of 225806 in words is "two hundred twenty-five thousand, eight hundred six".