218930912 has 24 divisors (see below), whose sum is σ = 431687592. Its totient is φ = 109296000.

The previous prime is 218930893. The next prime is 218930917. The reversal of 218930912 is 219039812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218930917) 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, 17162 + ... + 27062.

It is an arithmetic number, because the mean of its divisors is an integer number (17986983).

Almost surely, 2^218930912 is an apocalyptic number.

It is an amenable number.

218930912 is a deficient number, since it is larger than the sum of its proper divisors (212756680).

218930912 is an equidigital number, since it uses as much as digits as its factorization.

218930912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10602 (or 10594 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 218930912 is about 14796.3141356217. The cubic root of 218930912 is about 602.7016245244.

Subtracting 218930912 from its reverse (219039812), we obtain a square (108900 = 330²).

The spelling of 218930912 in words is "two hundred eighteen million, nine hundred thirty thousand, nine hundred twelve".