516516251 has 2 divisors, whose sum is σ = 516516252. Its totient is φ = 516516250.

The previous prime is 516516233. The next prime is 516516289. The reversal of 516516251 is 152615615.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-516516251 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (516512251) 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, 258258125 + 258258126.

It is an arithmetic number, because the mean of its divisors is an integer number (258258126).

Almost surely, 2^516516251 is an apocalyptic number.

516516251 is a deficient number, since it is larger than the sum of its proper divisors (1).

516516251 is an equidigital number, since it uses as much as digits as its factorization.

516516251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9000, while the sum is 32.

The square root of 516516251 is about 22726.9938839258. The cubic root of 516516251 is about 802.3453316179.

The spelling of 516516251 in words is "five hundred sixteen million, five hundred sixteen thousand, two hundred fifty-one".