216568223 has 2 divisors, whose sum is σ = 216568224. Its totient is φ = 216568222.

The previous prime is 216568217. The next prime is 216568241. The reversal of 216568223 is 322865612.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216568223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216568823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108284111 + 108284112.

It is an arithmetic number, because the mean of its divisors is an integer number (108284112).

Almost surely, 2^216568223 is an apocalyptic number.

216568223 is a deficient number, since it is larger than the sum of its proper divisors (1).

216568223 is an equidigital number, since it uses as much as digits as its factorization.

216568223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 35.

The square root of 216568223 is about 14716.2570988686. The cubic root of 216568223 is about 600.5256717216.

The spelling of 216568223 in words is "two hundred sixteen million, five hundred sixty-eight thousand, two hundred twenty-three".