5518 has 8 divisors (see below), whose sum is σ = 8640. Its totient is φ = 2640.

The previous prime is 5507. The next prime is 5519. The reversal of 5518 is 8155.

5518 is nontrivially palindromic in base 6.

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

It is a plaindrome in base 16.

It is a nialpdrome in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 5495 and 5504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18 + ... + 106.

It is an arithmetic number, because the mean of its divisors is an integer number (1080).

2⁵⁵¹⁸ is an apocalyptic number.

5518 is a deficient number, since it is larger than the sum of its proper divisors (3122).

5518 is a wasteful number, since it uses less digits than its factorization.

5518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122.

The product of its digits is 200, while the sum is 19.

The square root of 5518 is about 74.2832417171. The cubic root of 5518 is about 17.6709771532.

It can be divided in two parts, 55 and 18, that multiplied together give a triangular number (990 = T₄₄).

The spelling of 5518 in words is "five thousand, five hundred eighteen".