218459 has 2 divisors, whose sum is σ = 218460. Its totient is φ = 218458.

The previous prime is 218453. The next prime is 218461. The reversal of 218459 is 954812.

218459 is nontrivially palindromic in base 13.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 218459 - 2¹² = 214363 is a prime.

Together with 218461, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 15 and base 16.

It is not a weakly prime, because it can be changed into another prime (218453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109229 + 109230.

It is an arithmetic number, because the mean of its divisors is an integer number (109230).

2²¹⁸⁴⁵⁹ is an apocalyptic number.

218459 is a deficient number, since it is larger than the sum of its proper divisors (1).

218459 is an equidigital number, since it uses as much as digits as its factorization.

218459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 29.

The square root of 218459 is about 467.3959777319. The cubic root of 218459 is about 60.2268265995.

The spelling of 218459 in words is "two hundred eighteen thousand, four hundred fifty-nine".