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'''235''' is the integer
==In mathematics==
'''235''' is:
235 is a [[figurate number]] in two ways: it is both a [[heptagonal number]]<ref>{{SloanesRef|A000566|name=Heptagonal numbers}}</ref>▼
and a [[centered triangular number]].<ref>{{SloanesRef|A005448|name=Centered triangular numbers}}</ref>▼
*a [[semiprime]].
There are 235 different [[Tree (mathematics)|trees]] with 11 unlabeled nodes.<ref>{{SloanesRef|A000055|name=Number of trees with n unlabeled nodes}}</ref>▼
▲
If an [[equilateral triangle]] is subdivided into smaller equilateral triangles whose side length is 1/9 as small, the resulting "matchstick arrangement" will have exactly 235 different equilateral triangles of varying sizes in it.<ref>{{SloanesRef|A002717}}</ref>▼
▲
*therefore a [[figurate number]] in two ways.
*palindromic in bases 4 (3223<sub>4</sub>), 7 (454<sub>7</sub>), 8 (353<sub>8</sub>), 13 (151<sub>13</sub>), 46 (55<sub>46</sub>) and 234 (11<sub>234</sub>)
*a [[Harshad number]] in bases 6, 47, 48, 95, 116, 189 and 231.
Also:
▲*There are 235 different [[Tree (mathematics)|trees]] with 11 unlabeled nodes.<ref>{{SloanesRef|A000055|name=Number of trees with n unlabeled nodes}}</ref>
▲*If an [[equilateral triangle]] is subdivided into smaller equilateral triangles whose side length is 1/9 as small, the resulting "matchstick arrangement" will have exactly 235 different equilateral triangles of varying sizes in it.<ref>{{SloanesRef|A002717}}</ref>
==In science==
*U-235 is the fissile isotope of [[uranium]] used in the first atomic bombs.
==See also==
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