Il numero romano MMDLI nel sistema decimale vale: 2551.
MMDLI in latino si scrive duo milia quingenti quinquaginta unus,
mentre in italiano duemilacinquecentocinquantuno.
MMDXXXII, MMDXXXIII, MMDXXXIV, MMDXXXV, MMDXXXVI, MMDXXXVII, MMDXXXVIII, MMDXXXIX, MMDXL, MMDXLI, MMDXLII, MMDXLIII, MMDXLIV, MMDXLV, MMDXLVI, MMDXLVII, MMDXLVIII, MMDXLIX, MMDL, MMDLII, MMDLIII, MMDLIV, MMDLV, MMDLVI, MMDLVII, MMDLVIII, MMDLIX, MMDLX, MMDLXI, MMDLXII, MMDLXIII, MMDLXIV, MMDLXV, MMDLXVI, MMDLXVII, MMDLXVIII, MMDLXIX, MMDLXX