518291 has 2 divisors, whose sum is σ = 518292. Its totient is φ = 518290.

The previous prime is 518261. The next prime is 518299. The reversal of 518291 is 192815.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 518291 - 2¹⁰ = 517267 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 518291.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 518291.

It is not a weakly prime, because it can be changed into another prime (518299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 259145 + 259146.

It is an arithmetic number, because the mean of its divisors is an integer number (259146).

2⁵¹⁸²⁹¹ is an apocalyptic number.

518291 is a deficient number, since it is larger than the sum of its proper divisors (1).

518291 is an equidigital number, since it uses as much as digits as its factorization.

518291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720, while the sum is 26.

The square root of 518291 is about 719.9243015762. The cubic root of 518291 is about 80.3263233535.

The spelling of 518291 in words is "five hundred eighteen thousand, two hundred ninety-one".