218232017 has 2 divisors, whose sum is σ = 218232018. Its totient is φ = 218232016.

The previous prime is 218231999. The next prime is 218232019. The reversal of 218232017 is 710232812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161696656 + 56535361 = 12716^2 + 7519^2 .

It is a cyclic number.

It is not a de Polignac number, because 218232017 - 2¹² = 218227921 is a prime.

Together with 218232019, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (218232019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109116008 + 109116009.

It is an arithmetic number, because the mean of its divisors is an integer number (109116009).

Almost surely, 2^218232017 is an apocalyptic number.

It is an amenable number.

218232017 is a deficient number, since it is larger than the sum of its proper divisors (1).

218232017 is an equidigital number, since it uses as much as digits as its factorization.

218232017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 218232017 is about 14772.6780578201. The cubic root of 218232017 is about 602.0596043675.

Adding to 218232017 its reverse (710232812), we get a palindrome (928464829).

The spelling of 218232017 in words is "two hundred eighteen million, two hundred thirty-two thousand, seventeen".