218003 has 2 divisors, whose sum is σ = 218004. Its totient is φ = 218002.

The previous prime is 217981. The next prime is 218021. The reversal of 218003 is 300812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 218003 - 2⁸ = 217747 is a prime.

It is not a weakly prime, because it can be changed into another prime (218083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109001 + 109002.

It is an arithmetic number, because the mean of its divisors is an integer number (109002).

2²¹⁸⁰⁰³ is an apocalyptic number.

218003 is a deficient number, since it is larger than the sum of its proper divisors (1).

218003 is an equidigital number, since it uses as much as digits as its factorization.

218003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 218003 is about 466.9079138331. The cubic root of 218003 is about 60.1848926230.

Adding to 218003 its reverse (300812), we get a palindrome (518815).

The spelling of 218003 in words is "two hundred eighteen thousand, three".