218112812 has 6 divisors (see below), whose sum is σ = 381697428. Its totient is φ = 109056404.

The previous prime is 218112809. The next prime is 218112821. The reversal of 218112812 is 218211812.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27264098 + ... + 27264105.

It is an arithmetic number, because the mean of its divisors is an integer number (63616238).

Almost surely, 2^218112812 is an apocalyptic number.

It is an amenable number.

218112812 is a deficient number, since it is larger than the sum of its proper divisors (163584616).

218112812 is a wasteful number, since it uses less digits than its factorization.

218112812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54528207 (or 54528205 counting only the distinct ones).

The product of its digits is 512, while the sum is 26.

The square root of 218112812 is about 14768.6428624976. The cubic root of 218112812 is about 601.9499632808.

The spelling of 218112812 in words is "two hundred eighteen million, one hundred twelve thousand, eight hundred twelve".