218249 has 2 divisors, whose sum is σ = 218250. Its totient is φ = 218248.

The previous prime is 218233. The next prime is 218279. The reversal of 218249 is 942812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193600 + 24649 = 440^2 + 157^2 .

It is a cyclic number.

It is not a de Polignac number, because 218249 - 2⁴ = 218233 is a prime.

It is a Chen prime.

It is a plaindrome in base 15.

It is a nialpdrome in base 8.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 218249.

It is not a weakly prime, because it can be changed into another prime (218279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109124 + 109125.

It is an arithmetic number, because the mean of its divisors is an integer number (109125).

2²¹⁸²⁴⁹ is an apocalyptic number.

It is an amenable number.

218249 is a deficient number, since it is larger than the sum of its proper divisors (1).

218249 is an equidigital number, since it uses as much as digits as its factorization.

218249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 26.

The square root of 218249 is about 467.1712748019. The cubic root of 218249 is about 60.2075221558.

The spelling of 218249 in words is "two hundred eighteen thousand, two hundred forty-nine".