Il numero romano MMMMCDXXXI nel sistema decimale vale: 4431.
MMMMCDXXXI in latino si scrive quattuor milia quadringenti triginta unus,
mentre in italiano quattromilaquattrocentotrentuno.
MMMMCDXII, MMMMCDXIII, MMMMCDXIV, MMMMCDXV, MMMMCDXVI, MMMMCDXVII, MMMMCDXVIII, MMMMCDXIX, MMMMCDXX, MMMMCDXXI, MMMMCDXXII, MMMMCDXXIII, MMMMCDXXIV, MMMMCDXXV, MMMMCDXXVI, MMMMCDXXVII, MMMMCDXXVIII, MMMMCDXXIX, MMMMCDXXX, MMMMCDXXXII, MMMMCDXXXIII, MMMMCDXXXIV, MMMMCDXXXV, MMMMCDXXXVI, MMMMCDXXXVII, MMMMCDXXXVIII, MMMMCDXXXIX, MMMMCDXL, MMMMCDXLI, MMMMCDXLII, MMMMCDXLIII, MMMMCDXLIV, MMMMCDXLV, MMMMCDXLVI, MMMMCDXLVII, MMMMCDXLVIII, MMMMCDXLIX, MMMMCDL