216343212 has 24 divisors (see below), whose sum is σ = 509801712. Its totient is φ = 71400000.

The previous prime is 216343187. The next prime is 216343223. The reversal of 216343212 is 212343612.

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

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88039 + ... + 90462.

It is an arithmetic number, because the mean of its divisors is an integer number (21241738).

Almost surely, 2^216343212 is an apocalyptic number.

It is an amenable number.

216343212 is an abundant number, since it is smaller than the sum of its proper divisors (293458500).

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

216343212 is a wasteful number, since it uses less digits than its factorization.

216343212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178609 (or 178607 counting only the distinct ones).

The product of its digits is 1728, while the sum is 24.

The square root of 216343212 is about 14708.6101314842. The cubic root of 216343212 is about 600.3176207210.

Adding to 216343212 its reverse (212343612), we get a palindrome (428686824).

The spelling of 216343212 in words is "two hundred sixteen million, three hundred forty-three thousand, two hundred twelve".