218994211 has 2 divisors, whose sum is σ = 218994212. Its totient is φ = 218994210.

The previous prime is 218994203. The next prime is 218994301. The reversal of 218994211 is 112499812.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 218994211 - 2³ = 218994203 is a prime.

It is not a weakly prime, because it can be changed into another prime (218994311) 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, 109497105 + 109497106.

It is an arithmetic number, because the mean of its divisors is an integer number (109497106).

Almost surely, 2^218994211 is an apocalyptic number.

218994211 is a deficient number, since it is larger than the sum of its proper divisors (1).

218994211 is an equidigital number, since it uses as much as digits as its factorization.

218994211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 37.

The square root of 218994211 is about 14798.4529934720. The cubic root of 218994211 is about 602.7597048469.

The spelling of 218994211 in words is "two hundred eighteen million, nine hundred ninety-four thousand, two hundred eleven".