218279 has 2 divisors, whose sum is σ = 218280. Its totient is φ = 218278.

The previous prime is 218249. The next prime is 218287. The reversal of 218279 is 972812.

It is a happy number.

218279 is nontrivially palindromic in base 14.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-218279 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (218249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109139 + 109140.

It is an arithmetic number, because the mean of its divisors is an integer number (109140).

2²¹⁸²⁷⁹ is an apocalyptic number.

218279 is a deficient number, since it is larger than the sum of its proper divisors (1).

218279 is an equidigital number, since it uses as much as digits as its factorization.

218279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 29.

The square root of 218279 is about 467.2033818371. The cubic root of 218279 is about 60.2102806914.

It can be divided in two parts, 2 and 18279, that added together give a palindrome (18281).

The spelling of 218279 in words is "two hundred eighteen thousand, two hundred seventy-nine".