216304563 has 8 divisors (see below), whose sum is σ = 288474048. Its totient is φ = 144169064.

The previous prime is 216304559. The next prime is 216304573. The reversal of 216304563 is 365403612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 216304563 - 2² = 216304559 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216304563.

It is not an unprimeable number, because it can be changed into a prime (216304573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20356 + ... + 29102.

It is an arithmetic number, because the mean of its divisors is an integer number (36059256).

Almost surely, 2^216304563 is an apocalyptic number.

216304563 is a deficient number, since it is larger than the sum of its proper divisors (72169485).

216304563 is an equidigital number, since it uses as much as digits as its factorization.

216304563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16993.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 216304563 is about 14707.2962505010. The cubic root of 216304563 is about 600.2818703389.

The spelling of 216304563 in words is "two hundred sixteen million, three hundred four thousand, five hundred sixty-three".