216648323 has 4 divisors (see below), whose sum is σ = 229392360. Its totient is φ = 203904288.

The previous prime is 216648301. The next prime is 216648331. The reversal of 216648323 is 323846612.

216648323 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 216648323 - 2¹² = 216644227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216648023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6371993 + ... + 6372026.

It is an arithmetic number, because the mean of its divisors is an integer number (57348090).

Almost surely, 2^216648323 is an apocalyptic number.

216648323 is a deficient number, since it is larger than the sum of its proper divisors (12744037).

216648323 is a wasteful number, since it uses less digits than its factorization.

216648323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12744036.

The product of its digits is 41472, while the sum is 35.

The square root of 216648323 is about 14718.9783273161. The cubic root of 216648323 is about 600.5996994753.

The spelling of 216648323 in words is "two hundred sixteen million, six hundred forty-eight thousand, three hundred twenty-three".