216723163 has 2 divisors, whose sum is σ = 216723164. Its totient is φ = 216723162.

The previous prime is 216723151. The next prime is 216723173. The reversal of 216723163 is 361327612.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216723163 is a prime.

It is not a weakly prime, because it can be changed into another prime (216723113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108361581 + 108361582.

It is an arithmetic number, because the mean of its divisors is an integer number (108361582).

Almost surely, 2^216723163 is an apocalyptic number.

216723163 is a deficient number, since it is larger than the sum of its proper divisors (1).

216723163 is an equidigital number, since it uses as much as digits as its factorization.

216723163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 31.

The square root of 216723163 is about 14721.5204038170. The cubic root of 216723163 is about 600.6688494939.

The spelling of 216723163 in words is "two hundred sixteen million, seven hundred twenty-three thousand, one hundred sixty-three".