216544304 has 20 divisors (see below), whose sum is σ = 419790840. Its totient is φ = 108211200.

The previous prime is 216544253. The next prime is 216544319. The reversal of 216544304 is 403445612.

216544304 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×216544304³ (a number of 26 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42704 + ... + 47504.

It is an arithmetic number, because the mean of its divisors is an integer number (20989542).

Almost surely, 2^216544304 is an apocalyptic number.

It is an amenable number.

216544304 is a deficient number, since it is larger than the sum of its proper divisors (203246536).

216544304 is a wasteful number, since it uses less digits than its factorization.

216544304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7628 (or 7622 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 216544304 is about 14715.4444037549. Note that the first 4 decimals coincide. The cubic root of 216544304 is about 600.5035624417.

Adding to 216544304 its reverse (403445612), we get a palindrome (619989916).

The spelling of 216544304 in words is "two hundred sixteen million, five hundred forty-four thousand, three hundred four".