ompohualli ommatlactli oce.

Headword: 
ompohualli ommatlactli oce.
Principal English Translation: 

fifty-one (2 x 20, + 10, + 1)

Orthographic Variants: 
ompoalli ommatlactli oce
Alonso de Molina: 

ompoalli ommatlactli oce. cincuenta y vno.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 76v. col. 2. Thanks to Joe Campbell for providing the transcription.