218199019 has 2 divisors, whose sum is σ = 218199020. Its totient is φ = 218199018.

The previous prime is 218198993. The next prime is 218199041. The reversal of 218199019 is 910991812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 218199019 - 2¹¹ = 218196971 is a prime.

It is a super-2 number, since 2×218199019² = 95221623785124722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (218199119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109099509 + 109099510.

It is an arithmetic number, because the mean of its divisors is an integer number (109099510).

Almost surely, 2^218199019 is an apocalyptic number.

218199019 is a deficient number, since it is larger than the sum of its proper divisors (1).

218199019 is an equidigital number, since it uses as much as digits as its factorization.

218199019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 40.

The square root of 218199019 is about 14771.5611564926. The cubic root of 218199019 is about 602.0292578209.

The spelling of 218199019 in words is "two hundred eighteen million, one hundred ninety-nine thousand, nineteen".