. . . 308,745,538 People
If we split it evenly, my share of the U.S. National debt is $44,917.43.
I would write a check tomorrow, iff:
1. Everyone else in the USA would do the same (or Bill Gates, Warren Buffet, et. al. would do it for them).
2. The bastards in DC would quit spending more than we give them.
By the way, "iff" is a very precise mathematical/logical term.
In military terms, it means "Identify Friend or Foe."
Although - considering the subject - that definition is relatively appropos, I use it in the context of a biconditional logical connective.