225717239 has 16 divisors (see below), whose sum is σ = 257644800. Its totient is φ = 195740160.

The previous prime is 225717221. The next prime is 225717251. The reversal of 225717239 is 932717522.

It is a happy number.

It is not a de Polignac number, because 225717239 - 2²⁴ = 208940023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225717209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112604 + ... + 114590.

It is an arithmetic number, because the mean of its divisors is an integer number (16102800).

Almost surely, 2^225717239 is an apocalyptic number.

225717239 is a deficient number, since it is larger than the sum of its proper divisors (31927561).

225717239 is a wasteful number, since it uses less digits than its factorization.

225717239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2470.

The product of its digits is 52920, while the sum is 38.

The square root of 225717239 is about 15023.8889439452. Note that the first 3 decimals coincide. The cubic root of 225717239 is about 608.8657944157.

The spelling of 225717239 in words is "two hundred twenty-five million, seven hundred seventeen thousand, two hundred thirty-nine".