225556 has 24 divisors (see below), whose sum is σ = 435456. Its totient is φ = 101760.

The previous prime is 225529. The next prime is 225569. The reversal of 225556 is 655522.

It is a plaindrome in base 10.

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 225556.

It is a congruent number.

It is an unprimeable number.

225556 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, 2055 + ... + 2161.

It is an arithmetic number, because the mean of its divisors is an integer number (18144).

2²²⁵⁵⁵⁶ is an apocalyptic number.

It is an amenable number.

225556 is a deficient number, since it is larger than the sum of its proper divisors (209900).

225556 is a wasteful number, since it uses less digits than its factorization.

225556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159 (or 157 counting only the distinct ones).

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

The square root of 225556 is about 474.9273628672. The cubic root of 225556 is about 60.8720780684.

The spelling of 225556 in words is "two hundred twenty-five thousand, five hundred fifty-six".