It is an Octogenarian.
I spell it as eighty-one.
The ordinal number 80th is spelled eightieth.I swear this is the eightieth time I've had to help someone spell a word today.
One hundred and eighty
Eighty-one
The numeral value is "eighty one" (US adjective eighty-one).The currency value in US dollars is "eighty-one dollars" (and no cents).
One hundred eighty three.
The number 781 is spelled seven hundred and eighty-one OR seven hundred eighty-one.
nineteen eighty-seven one thousand, nine hundred and eighty-seven
One thousand two hundred and eighty one.
It is spelled "one hundred eighty eight".
five and eighty-one hundredths
Sixty-three and eighty-one hundredths.