516031987 has 2 divisors, whose sum is σ = 516031988. Its totient is φ = 516031986.

The previous prime is 516031981. The next prime is 516032017. The reversal of 516031987 is 789130615.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 516031987 - 2¹⁵ = 515999219 is a prime.

It is not a weakly prime, because it can be changed into another prime (516031981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258015993 + 258015994.

It is an arithmetic number, because the mean of its divisors is an integer number (258015994).

Almost surely, 2^516031987 is an apocalyptic number.

516031987 is a deficient number, since it is larger than the sum of its proper divisors (1).

516031987 is an equidigital number, since it uses as much as digits as its factorization.

516031987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 516031987 is about 22716.3374468685. The cubic root of 516031987 is about 802.0945047558.

The spelling of 516031987 in words is "five hundred sixteen million, thirty-one thousand, nine hundred eighty-seven".