516939931 has 4 divisors (see below), whose sum is σ = 529548264. Its totient is φ = 504331600.

The previous prime is 516939919. The next prime is 516939947. The reversal of 516939931 is 139939615.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 516939931 - 2⁹ = 516939419 is a prime.

It is a super-2 number, since 2×516939931² = 534453784524569522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (516937931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6304105 + ... + 6304186.

It is an arithmetic number, because the mean of its divisors is an integer number (132387066).

Almost surely, 2^516939931 is an apocalyptic number.

516939931 is a deficient number, since it is larger than the sum of its proper divisors (12608333).

516939931 is a wasteful number, since it uses less digits than its factorization.

516939931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12608332.

The product of its digits is 196830, while the sum is 46.

The square root of 516939931 is about 22736.3130476337. The cubic root of 516939931 is about 802.5646501553.

The spelling of 516939931 in words is "five hundred sixteen million, nine hundred thirty-nine thousand, nine hundred thirty-one".