621594.51 元用英语写怎么写啊?

six hundred and twenty-one thousand five hundred and ninety-four point five one yuan

621594.51:
six hundred and twenty-one thousand, five hundred and ninety-four point fifty-one yuan

six hundred and twenty-one thousand five hundred and ninety-four point fifty-one RMB

外国人大多说RMB，很少说YUAN的，楼上注意了！

621594.51 yuan

以上是最简便的说法～！＾＿＾