225820317 has 16 divisors (see below), whose sum is σ = 310409280. Its totient is φ = 145959552.

The previous prime is 225820307. The next prime is 225820319. The reversal of 225820317 is 713028522.

It is not a de Polignac number, because 225820317 - 2²⁰ = 224771741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225820319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4183 + ... + 21659.

It is an arithmetic number, because the mean of its divisors is an integer number (19400580).

Almost surely, 2^225820317 is an apocalyptic number.

It is an amenable number.

225820317 is a deficient number, since it is larger than the sum of its proper divisors (84588963).

225820317 is a wasteful number, since it uses less digits than its factorization.

225820317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17612.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 225820317 is about 15027.3190223672. The cubic root of 225820317 is about 608.9584636294.

Adding to 225820317 its reverse (713028522), we get a palindrome (938848839).

The spelling of 225820317 in words is "two hundred twenty-five million, eight hundred twenty thousand, three hundred seventeen".