Rather than comparing the number to GDPs, it's more fun to point out just how stupid this number is.
There are 223 x 24 x 60 = 321,120 minutes in the year so far (January 1, 2007 through August 11, 2007 inclusive, so I'm being generous).
At $5 per minute for ALL minutes, 24 hours per day, 7 days a week that's a $1,605,600 per phone phone bill. Even on a sliding scale where early minutes are cheap and later ones are sky-high, I think $5/minute is still almost certainly greater than the maximum.
So let's see, $218 trillion/$1.6 million = 135,774,887 phones.
So the poor dead man must have had almost 136 million people using his phone!
Look alive, people! The dead are calling us! And they're racking up roaming charges!
Joe