225555331 has 4 divisors (see below), whose sum is σ = 225683200. Its totient is φ = 225427464.

The previous prime is 225555313. The next prime is 225555353. The reversal of 225555331 is 133555522.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 225555331 - 2⁷ = 225555203 is a prime.

It is a super-2 number, since 2×225555331² = 101750414685039122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 225555293 and 225555302.

It is not an unprimeable number, because it can be changed into a prime (225555311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61251 + ... + 64828.

It is an arithmetic number, because the mean of its divisors is an integer number (56420800).

Almost surely, 2^225555331 is an apocalyptic number.

225555331 is a deficient number, since it is larger than the sum of its proper divisors (127869).

225555331 is a wasteful number, since it uses less digits than its factorization.

225555331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127868.

The product of its digits is 22500, while the sum is 31.

The square root of 225555331 is about 15018.4996254619. The cubic root of 225555331 is about 608.7201788606.

The spelling of 225555331 in words is "two hundred twenty-five million, five hundred fifty-five thousand, three hundred thirty-one".