Il numero 181, centottantuno in Italiano, in Inglese si dice one hundred eighty-one.
Il numero ordinale 181° in inglese si dice one hundred eighty-first.
172: one hundred seventy-two
173: one hundred seventy-three
174: one hundred seventy-four
175: one hundred seventy-five
176: one hundred seventy-six
177: one hundred seventy-seven
178: one hundred seventy-eight
179: one hundred seventy-nine
180: one hundred eighty
182: one hundred eighty-two
183: one hundred eighty-three
184: one hundred eighty-four
185: one hundred eighty-five
186: one hundred eighty-six
187: one hundred eighty-seven
188: one hundred eighty-eight
189: one hundred eighty-nine
190: one hundred ninety