6543216 has 30 divisors (see below), whose sum is σ = 18312320. Its totient is φ = 2181024.

The previous prime is 6543203. The next prime is 6543223. The reversal of 6543216 is 6123456.

6543216 is a `hidden beast` number, since 654 + 3 + 2 + 1 + 6 = 666.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 6543216.

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 5 ways as a sum of consecutive naturals, for example, 22576 + ... + 22863.

Almost surely, 2^6543216 is an apocalyptic number.

It is an amenable number.

6543216 is an abundant number, since it is smaller than the sum of its proper divisors (11769104).

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

6543216 is a wasteful number, since it uses less digits than its factorization.

6543216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45453 (or 45444 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 6543216 is about 2557.9710709858. The cubic root of 6543216 is about 187.0382451064.

The spelling of 6543216 in words is "six million, five hundred forty-three thousand, two hundred sixteen".