516315031 has 4 divisors (see below), whose sum is σ = 516417352. Its totient is φ = 516212712.

The previous prime is 516315011. The next prime is 516315073. The reversal of 516315031 is 130513615.

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 516315031 - 2¹⁷ = 516183959 is a prime.

It is a super-2 number, since 2×516315031² = 533162422473061922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 516314987 and 516315005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (516315011) 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, 43176 + ... + 53821.

It is an arithmetic number, because the mean of its divisors is an integer number (129104338).

Almost surely, 2^516315031 is an apocalyptic number.

516315031 is a deficient number, since it is larger than the sum of its proper divisors (102321).

516315031 is an equidigital number, since it uses as much as digits as its factorization.

516315031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102320.

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 516315031 is about 22722.5665583798. The cubic root of 516315031 is about 802.2411277992.

Adding to 516315031 its reverse (130513615), we get a palindrome (646828646).

The spelling of 516315031 in words is "five hundred sixteen million, three hundred fifteen thousand, thirty-one".