This is the 5047th most frequent French word.
treize
Thirteen.
In this sentence, 'treize' is used as a cardinal number to enumerate items.
Il y a treize livres sur la table.
There are thirteen books on the table.
Here, 'treize' indicates a specific date in conjunction with the weekday 'vendredi'.
Elle est née un vendredi treize.
She was born on a Friday the thirteenth.
In this case, 'Treize' functions as a noun representing the number thirteen itself.