516386931 has 16 divisors (see below), whose sum is σ = 694506240. Its totient is φ = 341272800.

The previous prime is 516386903. The next prime is 516386947. The reversal of 516386931 is 139683615.

It is a happy number.

It is not a de Polignac number, because 516386931 - 2⁶ = 516386867 is a prime.

It is a super-2 number, since 2×516386931² = 533310925015197522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (516386971) 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 in 15 ways as a sum of consecutive naturals, for example, 308565 + ... + 310233.

It is an arithmetic number, because the mean of its divisors is an integer number (43406640).

Almost surely, 2^516386931 is an apocalyptic number.

516386931 is a deficient number, since it is larger than the sum of its proper divisors (178119309).

516386931 is a wasteful number, since it uses less digits than its factorization.

516386931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2506.

The product of its digits is 116640, while the sum is 42.

The square root of 516386931 is about 22724.1486309168. The cubic root of 516386931 is about 802.2783650519.

The spelling of 516386931 in words is "five hundred sixteen million, three hundred eighty-six thousand, nine hundred thirty-one".