518317 has 8 divisors (see below), whose sum is σ = 546840. Its totient is φ = 490560.

The previous prime is 518311. The next prime is 518327. The reversal of 518317 is 713815.

It can be written as a sum of positive squares in 4 ways, for example, as 70756 + 447561 = 266^2 + 669^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-518317 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 518291 and 518300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (518311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1623 + ... + 1915.

It is an arithmetic number, because the mean of its divisors is an integer number (68355).

2⁵¹⁸³¹⁷ is an apocalyptic number.

It is an amenable number.

518317 is a deficient number, since it is larger than the sum of its proper divisors (28523).

518317 is a wasteful number, since it uses less digits than its factorization.

518317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383.

The product of its digits is 840, while the sum is 25.

The square root of 518317 is about 719.9423588038. The cubic root of 518317 is about 80.3276665175.

The spelling of 518317 in words is "five hundred eighteen thousand, three hundred seventeen".