The number 231,000 is spelled "two hundred thirty-one thousand."
Two hundred and thirty-one
The correct spelling is "thousand."
six thousand
800 thousand, or 800,000 is "eight hundred thousand."
1000, one thousand, you had it correct.
The number 30,000 is "thirty thousand."
That is the correct spelling of the plural noun "thousands."
Two thousand and eleven.
Two thousand and six.
It is two words, nineteen thousand.
"Ten thousand to twenty thousand"
Ninety thousand.