225711517 has 2 divisors, whose sum is σ = 225711518. Its totient is φ = 225711516.

The previous prime is 225711491. The next prime is 225711523. The reversal of 225711517 is 715117522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 224220676 + 1490841 = 14974^2 + 1221^2 .

It is a cyclic number.

It is not a de Polignac number, because 225711517 - 2⁷ = 225711389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225711587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112855758 + 112855759.

It is an arithmetic number, because the mean of its divisors is an integer number (112855759).

Almost surely, 2^225711517 is an apocalyptic number.

It is an amenable number.

225711517 is a deficient number, since it is larger than the sum of its proper divisors (1).

225711517 is an equidigital number, since it uses as much as digits as its factorization.

225711517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4900, while the sum is 31.

The square root of 225711517 is about 15023.6985126832. The cubic root of 225711517 is about 608.8606493951.

The spelling of 225711517 in words is "two hundred twenty-five million, seven hundred eleven thousand, five hundred seventeen".