218203 has 4 divisors (see below), whose sum is σ = 220248. Its totient is φ = 216160.

The previous prime is 218191. The next prime is 218213. The reversal of 218203 is 302812.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 218203 - 2⁵ = 218171 is a prime.

It is a super-2 number, since 2×218203² = 95225098418, which contains 22 as substring.

It is a Duffinian number.

218203 is a lucky number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (218213) 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, 853 + ... + 1078.

It is an arithmetic number, because the mean of its divisors is an integer number (55062).

2²¹⁸²⁰³ is an apocalyptic number.

218203 is a deficient number, since it is larger than the sum of its proper divisors (2045).

218203 is a wasteful number, since it uses less digits than its factorization.

218203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2044.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 218203 is about 467.1220397284. The cubic root of 218203 is about 60.2032919102.

The spelling of 218203 in words is "two hundred eighteen thousand, two hundred three".