225655 has 4 divisors (see below), whose sum is σ = 270792. Its totient is φ = 180520.

The previous prime is 225637. The next prime is 225671. The reversal of 225655 is 556522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 556522 = 2 ⋅278261.

It is not a de Polignac number, because 225655 - 2⁷ = 225527 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 22561 + ... + 22570.

It is an arithmetic number, because the mean of its divisors is an integer number (67698).

2²²⁵⁶⁵⁵ is an apocalyptic number.

225655 is a deficient number, since it is larger than the sum of its proper divisors (45137).

225655 is an equidigital number, since it uses as much as digits as its factorization.

225655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45136.

The product of its digits is 3000, while the sum is 25.

The square root of 225655 is about 475.0315778977. The cubic root of 225655 is about 60.8809826631.

The spelling of 225655 in words is "two hundred twenty-five thousand, six hundred fifty-five".