216304343 has 6 divisors (see below), whose sum is σ = 217788144. Its totient is φ = 214830584.

The previous prime is 216304339. The next prime is 216304367. The reversal of 216304343 is 343403612.

It is a happy number.

It is not a de Polignac number, because 216304343 - 2² = 216304339 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216304313) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17330 + ... + 27072.

It is an arithmetic number, because the mean of its divisors is an integer number (36298024).

Almost surely, 2^216304343 is an apocalyptic number.

216304343 is a deficient number, since it is larger than the sum of its proper divisors (1483801).

216304343 is an frugal number, since it uses more digits than its factorization.

216304343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10041 (or 9892 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 26.

The square root of 216304343 is about 14707.2887712182. The cubic root of 216304343 is about 600.2816668264.

Adding to 216304343 its reverse (343403612), we get a palindrome (559707955).

The spelling of 216304343 in words is "two hundred sixteen million, three hundred four thousand, three hundred forty-three".