218303812 has 12 divisors (see below), whose sum is σ = 382200336. Its totient is φ = 109103720.

The previous prime is 218303807. The next prime is 218303821.

218303812 is nontrivially palindromic in base 10.

It is an alternating number because its digits alternate between even and odd.

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, 658 + ... + 20905.

It is an arithmetic number, because the mean of its divisors is an integer number (31850028).

Almost surely, 2^218303812 is an apocalyptic number.

It is an amenable number.

218303812 is a deficient number, since it is larger than the sum of its proper divisors (163896524).

218303812 is a wasteful number, since it uses less digits than its factorization.

218303812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24098 (or 24096 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 218303812 is about 14775.1078507062. The cubic root of 218303812 is about 602.1256199331.

The spelling of 218303812 in words is "two hundred eighteen million, three hundred three thousand, eight hundred twelve".