Il numero romano MDCXV nel sistema decimale vale: 1615.
MDCXV in latino si scrive mille sescenti quindecim,
mentre in italiano milleseicentoquindici.
MDXCVI, MDXCVII, MDXCVIII, MDXCIX, MDC, MDCI, MDCII, MDCIII, MDCIV, MDCV, MDCVI, MDCVII, MDCVIII, MDCIX, MDCX, MDCXI, MDCXII, MDCXIII, MDCXIV, MDCXVI, MDCXVII, MDCXVIII, MDCXIX, MDCXX, MDCXXI, MDCXXII, MDCXXIII, MDCXXIV, MDCXXV, MDCXXVI, MDCXXVII, MDCXXVIII, MDCXXIX, MDCXXX, MDCXXXI, MDCXXXII, MDCXXXIII, MDCXXXIV