218149808 has 10 divisors (see below), whose sum is σ = 422665284. Its totient is φ = 109074896.

The previous prime is 218149783. The next prime is 218149907. The reversal of 218149808 is 808941812.

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 as a sum of consecutive naturals, namely, 6817166 + ... + 6817197.

Almost surely, 2^218149808 is an apocalyptic number.

It is an amenable number.

218149808 is a deficient number, since it is larger than the sum of its proper divisors (204515476).

218149808 is a wasteful number, since it uses less digits than its factorization.

218149808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13634371 (or 13634365 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 41.

The square root of 218149808 is about 14769.8953279974. The cubic root of 218149808 is about 601.9839953361.

The spelling of 218149808 in words is "two hundred eighteen million, one hundred forty-nine thousand, eight hundred eight".