218219212 has 12 divisors (see below), whose sum is σ = 381994816. Its totient is φ = 109077840.

The previous prime is 218219173. The next prime is 218219249. The reversal of 218219212 is 212912812.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

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, 14662 + ... + 25522.

Almost surely, 2^218219212 is an apocalyptic number.

It is an amenable number.

218219212 is a deficient number, since it is larger than the sum of its proper divisors (163775604).

218219212 is a wasteful number, since it uses less digits than its factorization.

218219212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15888 (or 15886 counting only the distinct ones).

The product of its digits is 1152, while the sum is 28.

The square root of 218219212 is about 14772.2446500185. The cubic root of 218219212 is about 602.0478286374.

The spelling of 218219212 in words is "two hundred eighteen million, two hundred nineteen thousand, two hundred twelve".