225185717 has 2 divisors, whose sum is σ = 225185718. Its totient is φ = 225185716.

The previous prime is 225185687. The next prime is 225185729. The reversal of 225185717 is 717581522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 192820996 + 32364721 = 13886^2 + 5689^2 .

It is a cyclic number.

It is not a de Polignac number, because 225185717 - 2⁸ = 225185461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225182717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112592858 + 112592859.

It is an arithmetic number, because the mean of its divisors is an integer number (112592859).

Almost surely, 2^225185717 is an apocalyptic number.

It is an amenable number.

225185717 is a deficient number, since it is larger than the sum of its proper divisors (1).

225185717 is an equidigital number, since it uses as much as digits as its factorization.

225185717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 39200, while the sum is 38.

The square root of 225185717 is about 15006.1892897564. The cubic root of 225185717 is about 608.3874969892.

The spelling of 225185717 in words is "two hundred twenty-five million, one hundred eighty-five thousand, seven hundred seventeen".