13218199 has 2 divisors, whose sum is σ = 13218200. Its totient is φ = 13218198.

The previous prime is 13218181. The next prime is 13218209. The reversal of 13218199 is 99181231.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13218199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13218599) 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, 6609099 + 6609100.

It is an arithmetic number, because the mean of its divisors is an integer number (6609100).

Almost surely, 2^13218199 is an apocalyptic number.

13218199 is a deficient number, since it is larger than the sum of its proper divisors (1).

13218199 is an equidigital number, since it uses as much as digits as its factorization.

13218199 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 34.

The square root of 13218199 is about 3635.6841171917. The cubic root of 13218199 is about 236.4417120098.

The spelling of 13218199 in words is "thirteen million, two hundred eighteen thousand, one hundred ninety-nine".