2257518217 has 2 divisors, whose sum is σ = 2257518218. Its totient is φ = 2257518216.

The previous prime is 2257518203. The next prime is 2257518233. The reversal of 2257518217 is 7128157522.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1998179401 + 259338816 = 44701^2 + 16104^2 .

It is a cyclic number.

It is not a de Polignac number, because 2257518217 - 2¹¹ = 2257516169 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2257518217.

It is not a weakly prime, because it can be changed into another prime (2257518257) 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, 1128759108 + 1128759109.

It is an arithmetic number, because the mean of its divisors is an integer number (1128759109).

Almost surely, 2^2257518217 is an apocalyptic number.

It is an amenable number.

2257518217 is a deficient number, since it is larger than the sum of its proper divisors (1).

2257518217 is an equidigital number, since it uses as much as digits as its factorization.

2257518217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 78400, while the sum is 40.

The square root of 2257518217 is about 47513.3477772299. The cubic root of 2257518217 is about 1311.8285783946.

The spelling of 2257518217 in words is "two billion, two hundred fifty-seven million, five hundred eighteen thousand, two hundred seventeen".