The king's gross is equal to 223. The term was coined by Garrett Wilkinson.
223 is the only nonnegative integer which cannot be written as a sum of 36 nonnegative fifth powers (see Waring's problem). It is also the largest integer which cannot be written as a sum of 32, 33, 34 or 35 nonnegative fifth powers; there are only fifteen, ten, six and three nonnegative integers with this property, respectively.
In some countries, such as China, the Band III ends at 223 MHz.
It is also the number of non-control 8-bit characters.