218233 has 2 divisors, whose sum is σ = 218234. Its totient is φ = 218232.

The previous prime is 218227. The next prime is 218249. The reversal of 218233 is 332812.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 218089 + 144 = 467^2 + 12^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-218233 is a prime.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 218233.

It is not a weakly prime, because it can be changed into another prime (218213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109116 + 109117.

It is an arithmetic number, because the mean of its divisors is an integer number (109117).

2²¹⁸²³³ is an apocalyptic number.

It is an amenable number.

218233 is a deficient number, since it is larger than the sum of its proper divisors (1).

218233 is an equidigital number, since it uses as much as digits as its factorization.

218233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 19.

The square root of 218233 is about 467.1541501475. The cubic root of 218233 is about 60.2060508335.

The spelling of 218233 in words is "two hundred eighteen thousand, two hundred thirty-three".