225320305 has 32 divisors (see below), whose sum is σ = 325430784. Its totient is φ = 146420736.

The previous prime is 225320281. The next prime is 225320317. The reversal of 225320305 is 503023522.

It is not a de Polignac number, because 225320305 - 2⁵ = 225320273 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 89727 + ... + 92203.

It is an arithmetic number, because the mean of its divisors is an integer number (10169712).

Almost surely, 2^225320305 is an apocalyptic number.

It is an amenable number.

225320305 is a deficient number, since it is larger than the sum of its proper divisors (100110479).

225320305 is a wasteful number, since it uses less digits than its factorization.

225320305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2625.

The product of its (nonzero) digits is 1800, while the sum is 22.

The square root of 225320305 is about 15010.6730362099. The cubic root of 225320305 is about 608.5086789630.

Adding to 225320305 its reverse (503023522), we get a palindrome (728343827).

It can be divided in two parts, 225320 and 305, that added together give a square (225625 = 475²).

The spelling of 225320305 in words is "two hundred twenty-five million, three hundred twenty thousand, three hundred five".