518117 has 4 divisors (see below), whose sum is σ = 530796. Its totient is φ = 505440.

The previous prime is 518113. The next prime is 518123. The reversal of 518117 is 711815.

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

It can be written as a sum of positive squares in 2 ways, for example, as 36481 + 481636 = 191^2 + 694^2 .

It is a cyclic number.

It is not a de Polignac number, because 518117 - 2² = 518113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 518092 and 518101.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 518117.

It is not an unprimeable number, because it can be changed into a prime (518113) 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, 6278 + ... + 6359.

It is an arithmetic number, because the mean of its divisors is an integer number (132699).

2⁵¹⁸¹¹⁷ is an apocalyptic number.

It is an amenable number.

518117 is a deficient number, since it is larger than the sum of its proper divisors (12679).

518117 is a wasteful number, since it uses less digits than its factorization.

518117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12678.

The product of its digits is 280, while the sum is 23.

The square root of 518117 is about 719.8034453933. The cubic root of 518117 is about 80.3173333301.

It can be divided in two parts, 518 and 117, that multiplied together give a palindrome (60606).

The spelling of 518117 in words is "five hundred eighteen thousand, one hundred seventeen".