2512

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Number

$2512$ (two thousand, five hundred and twelve) is:

$2^4 \times 157$

The $32$nd heptagonal number after $1$, $7$, $18$, $34$, $55$, $81$, $112$, $\ldots$, $1525$, $1651$, $1782$, $1918$, $2059$, $2205$, $2356$:

$2512 = \ds \sum_{k \mathop = 1}^{32} \paren {5 k - 4} = \dfrac {32 \paren {5 \times 32 - 3} } 2$

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