218030399 has 2 divisors, whose sum is σ = 218030400. Its totient is φ = 218030398.

The previous prime is 218030353. The next prime is 218030467. The reversal of 218030399 is 993030812.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 218030399 - 2¹⁶ = 217964863 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (218035399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109015199 + 109015200.

It is an arithmetic number, because the mean of its divisors is an integer number (109015200).

Almost surely, 2^218030399 is an apocalyptic number.

218030399 is a deficient number, since it is larger than the sum of its proper divisors (1).

218030399 is an equidigital number, since it uses as much as digits as its factorization.

218030399 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 35.

The square root of 218030399 is about 14765.8524643855. The cubic root of 218030399 is about 601.8741389841.

The spelling of 218030399 in words is "two hundred eighteen million, thirty thousand, three hundred ninety-nine".