518206231 has 2 divisors, whose sum is σ = 518206232. Its totient is φ = 518206230.

The previous prime is 518206217. The next prime is 518206259. The reversal of 518206231 is 132602815.

It is an a-pointer prime, because the next prime (518206259) can be obtained adding 518206231 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-518206231 is a prime.

It is a super-2 number, since 2×518206231² = 537075395694450722, which contains 22 as substring.

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 518206231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (518206331) 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, 259103115 + 259103116.

It is an arithmetic number, because the mean of its divisors is an integer number (259103116).

Almost surely, 2^518206231 is an apocalyptic number.

518206231 is a deficient number, since it is larger than the sum of its proper divisors (1).

518206231 is an equidigital number, since it uses as much as digits as its factorization.

518206231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 518206231 is about 22764.1435375900. The cubic root of 518206231 is about 803.2194386183.

The spelling of 518206231 in words is "five hundred eighteen million, two hundred six thousand, two hundred thirty-one".