17218 has 4 divisors (see below), whose sum is σ = 25830. Its totient is φ = 8608.

The previous prime is 17209. The next prime is 17231. The reversal of 17218 is 81271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81271 = 67 ⋅1213.

It can be written as a sum of positive squares in only one way, i.e., 16129 + 1089 = 127^2 + 33^2 .

It is a junction number, because it is equal to n+sod(n) for n = 17195 and 17204.

It is an unprimeable 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, 4303 + ... + 4306.

2¹⁷²¹⁸ is an apocalyptic number.

17218 is a deficient number, since it is larger than the sum of its proper divisors (8612).

17218 is an equidigital number, since it uses as much as digits as its factorization.

17218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8611.

The product of its digits is 112, while the sum is 19.

The square root of 17218 is about 131.2173768980. The cubic root of 17218 is about 25.8222590989.

Adding to 17218 its reverse (81271), we get a palindrome (98489).

It can be divided in two parts, 172 and 18, that added together give a triangular number (190 = T₁₉).

The spelling of 17218 in words is "seventeen thousand, two hundred eighteen".