5218 has 4 divisors (see below), whose sum is σ = 7830. Its totient is φ = 2608.

The previous prime is 5209. The next prime is 5227. The reversal of 5218 is 8125.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (5209) and next prime (5227).

It can be written as a sum of positive squares in only one way, i.e., 4489 + 729 = 67^2 + 27^2 .

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

5218 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1303 + ... + 1306.

2⁵²¹⁸ is an apocalyptic number.

5218 is a deficient number, since it is larger than the sum of its proper divisors (2612).

5218 is a wasteful number, since it uses less digits than its factorization.

5218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2611.

The product of its digits is 80, while the sum is 16.

The square root of 5218 is about 72.2357252334. The cubic root of 5218 is about 17.3447492187.

It can be divided in two parts, 521 and 8, that added together give a square (529 = 23²).

The spelling of 5218 in words is "five thousand, two hundred eighteen".