252918517 has 2 divisors, whose sum is σ = 252918518. Its totient is φ = 252918516.

The previous prime is 252918473. The next prime is 252918529. The reversal of 252918517 is 715819252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196953156 + 55965361 = 14034^2 + 7481^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-252918517 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 252918517.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252918817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126459258 + 126459259.

It is an arithmetic number, because the mean of its divisors is an integer number (126459259).

Almost surely, 2^252918517 is an apocalyptic number.

It is an amenable number.

252918517 is a deficient number, since it is larger than the sum of its proper divisors (1).

252918517 is an equidigital number, since it uses as much as digits as its factorization.

252918517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50400, while the sum is 40.

The square root of 252918517 is about 15903.4121181588. The cubic root of 252918517 is about 632.4024477337.

The spelling of 252918517 in words is "two hundred fifty-two million, nine hundred eighteen thousand, five hundred seventeen".