216306236 has 12 divisors (see below), whose sum is σ = 379442280. Its totient is φ = 107894160.

The previous prime is 216306229. The next prime is 216306247. The reversal of 216306236 is 632603612.

It is a junction number, because it is equal to n+sod(n) for n = 216306199 and 216306208.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 62855 + ... + 66206.

It is an arithmetic number, because the mean of its divisors is an integer number (31620190).

Almost surely, 2^216306236 is an apocalyptic number.

It is an amenable number.

216306236 is a deficient number, since it is larger than the sum of its proper divisors (163136044).

216306236 is a wasteful number, since it uses less digits than its factorization.

216306236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129484 (or 129482 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 216306236 is about 14707.3531269226. The cubic root of 216306236 is about 600.2834179545.

Adding to 216306236 its reverse (632603612), we get a palindrome (848909848).

The spelling of 216306236 in words is "two hundred sixteen million, three hundred six thousand, two hundred thirty-six".