225815 has 8 divisors (see below), whose sum is σ = 285360. Its totient is φ = 171072.

The previous prime is 225809. The next prime is 225821. The reversal of 225815 is 518522.

It is an interprime number because it is at equal distance from previous prime (225809) and next prime (225821).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 225815 - 2⁶ = 225751 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1094 + ... + 1283.

It is an arithmetic number, because the mean of its divisors is an integer number (35670).

2²²⁵⁸¹⁵ is an apocalyptic number.

225815 is a deficient number, since it is larger than the sum of its proper divisors (59545).

225815 is a wasteful number, since it uses less digits than its factorization.

225815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2401.

The product of its digits is 800, while the sum is 23.

The square root of 225815 is about 475.1999579125. The cubic root of 225815 is about 60.8953684228.

The spelling of 225815 in words is "two hundred twenty-five thousand, eight hundred fifteen".