218814216 has 32 divisors (see below), whose sum is σ = 547418400. Its totient is φ = 72887040.

The previous prime is 218814181. The next prime is 218814227. The reversal of 218814216 is 612418812.

It is a super-3 number, since 3×218814216³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49755 + ... + 53973.

It is an arithmetic number, because the mean of its divisors is an integer number (17106825).

Almost surely, 2^218814216 is an apocalyptic number.

It is an amenable number.

218814216 is an abundant number, since it is smaller than the sum of its proper divisors (328604184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

218814216 is a wasteful number, since it uses less digits than its factorization.

218814216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6389 (or 6385 counting only the distinct ones).

The product of its digits is 6144, while the sum is 33.

The square root of 218814216 is about 14792.3701954758. The cubic root of 218814216 is about 602.5945201594.

The spelling of 218814216 in words is "two hundred eighteen million, eight hundred fourteen thousand, two hundred sixteen".