225208717 has 2 divisors, whose sum is σ = 225208718. Its totient is φ = 225208716.

The previous prime is 225208703. The next prime is 225208721. The reversal of 225208717 is 717802522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 170537481 + 54671236 = 13059^2 + 7394^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225208717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225208727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112604358 + 112604359.

It is an arithmetic number, because the mean of its divisors is an integer number (112604359).

Almost surely, 2^225208717 is an apocalyptic number.

It is an amenable number.

225208717 is a deficient number, since it is larger than the sum of its proper divisors (1).

225208717 is an equidigital number, since it uses as much as digits as its factorization.

225208717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 225208717 is about 15006.9556206447. The cubic root of 225208717 is about 608.4082094279.

The spelling of 225208717 in words is "two hundred twenty-five million, two hundred eight thousand, seven hundred seventeen".