216544316 has 12 divisors (see below), whose sum is σ = 382632432. Its totient is φ = 107220768.

The previous prime is 216544253. The next prime is 216544319. The reversal of 216544316 is 613445612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216544319) by changing a digit.

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, 262385 + ... + 263208.

It is an arithmetic number, because the mean of its divisors is an integer number (31886036).

Almost surely, 2^216544316 is an apocalyptic number.

It is an amenable number.

216544316 is a deficient number, since it is larger than the sum of its proper divisors (166088116).

216544316 is a wasteful number, since it uses less digits than its factorization.

216544316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525700 (or 525698 counting only the distinct ones).

The product of its digits is 17280, while the sum is 32.

The square root of 216544316 is about 14715.4448114897. Note that the first 3 decimals coincide. The cubic root of 216544316 is about 600.5035735342.

Adding to 216544316 its reverse (613445612), we get a palindrome (829989928).

The spelling of 216544316 in words is "two hundred sixteen million, five hundred forty-four thousand, three hundred sixteen".