218229808 has 20 divisors (see below), whose sum is σ = 426928528. Its totient is φ = 108054720.

The previous prime is 218229797. The next prime is 218229829. The reversal of 218229808 is 808922812.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64563 + ... + 67858.

Almost surely, 2^218229808 is an apocalyptic number.

It is an amenable number.

218229808 is a deficient number, since it is larger than the sum of its proper divisors (208698720).

218229808 is a wasteful number, since it uses less digits than its factorization.

218229808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132532 (or 132526 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 40.

The square root of 218229808 is about 14772.6032912280. The cubic root of 218229808 is about 602.0575729605.

The spelling of 218229808 in words is "two hundred eighteen million, two hundred twenty-nine thousand, eight hundred eight".