218830816 has 24 divisors (see below), whose sum is σ = 431396280. Its totient is φ = 109269888.

The previous prime is 218830811. The next prime is 218830819. The reversal of 218830816 is 618038812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218830811) 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 in 3 ways as a sum of consecutive naturals, for example, 22330 + ... + 30598.

It is an arithmetic number, because the mean of its divisors is an integer number (17974845).

Almost surely, 2^218830816 is an apocalyptic number.

It is an amenable number.

218830816 is a deficient number, since it is larger than the sum of its proper divisors (212565464).

218830816 is an equidigital number, since it uses as much as digits as its factorization.

218830816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9106 (or 9098 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 37.

The square root of 218830816 is about 14792.9312849077. The cubic root of 218830816 is about 602.6097580726.

The spelling of 218830816 in words is "two hundred eighteen million, eight hundred thirty thousand, eight hundred sixteen".