What is the numerical equivalent of "treinta y uno"?

The phrase "treinta y uno" translates directly to "thirty-one" in English. In the Spanish numbering system, "treinta" means thirty, and "y uno" means and one. When these parts are combined, they form the number 31. This understanding of how Spanish numbers are constructed is important, as it follows the pattern of stating the tens followed by the addition of units. Thus, the numerical equivalent of "treinta y uno" is indeed 31.