You had it right. It is forty.
Forty = vierzig
forty three
You spell it like this: Forty Five dollars.....
forty
Forty one is einundvierzig.
Forty.
"Forty thousand" in numbers is "40,000"
Yes, forty is the correct spelling for the number 40.
"Forty" in French becomes "quarante".
six hundred and forty...or 640
That is the correct spelling of forty-three (43).