218008216 has 16 divisors (see below), whose sum is σ = 409202640. Its totient is φ = 108887520.

The previous prime is 218008207. The next prime is 218008243. The reversal of 218008216 is 612800812.

218008216 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6355 + ... + 21826.

It is an arithmetic number, because the mean of its divisors is an integer number (25575165).

Almost surely, 2^218008216 is an apocalyptic number.

It is an amenable number.

218008216 is a deficient number, since it is larger than the sum of its proper divisors (191194424).

218008216 is a wasteful number, since it uses less digits than its factorization.

218008216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29154 (or 29150 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 218008216 is about 14765.1012864795. The cubic root of 218008216 is about 601.8537261931.

The spelling of 218008216 in words is "two hundred eighteen million, eight thousand, two hundred sixteen".