216306234 has 32 divisors (see below), whose sum is σ = 483120000. Its totient is φ = 71736192.

The previous prime is 216306229. The next prime is 216306247. The reversal of 216306234 is 432603612.

216306234 is a `hidden beast` number, since 2 + 1 + 6 + 30 + 623 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 216306198 and 216306207.

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 15 ways as a sum of consecutive naturals, for example, 682 + ... + 20810.

It is an arithmetic number, because the mean of its divisors is an integer number (15097500).

Almost surely, 2^216306234 is an apocalyptic number.

216306234 is an abundant number, since it is smaller than the sum of its proper divisors (266813766).

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

216306234 is a wasteful number, since it uses less digits than its factorization.

216306234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20339 (or 20333 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 216306234 is about 14707.3530589294. The cubic root of 216306234 is about 600.2834161044.

Adding to 216306234 its reverse (432603612), we get a palindrome (648909846).

The spelling of 216306234 in words is "two hundred sixteen million, three hundred six thousand, two hundred thirty-four".