Home » ∑ Sum symbol∑ Sum symbol Adeilson Silva9 de abril de 2021Math Symbols (∑) Sum symbol, copy and paste: ∑ Name: N-Ary Summation; Unicode number: U+2211; HTML-code: ∑ ; CSS-code: \2211; Entity: ∑ ; Block: Mathematical Operators; Unicode version: 1.1 (1993);