2133

Number
$2133$ (two thousand, one hundred and thirty-three) is:


 * $3^3 \times 79$


 * The $27$th octagonal number, after $1$, $8$, $21$, $40$, $65$, $\ldots$, $645$, $736$, $833$, $936$, $1045$, $1160$, $1281$, $1408$, $1541$, $1680$, $1825$, $1976$:
 * $2133 = \displaystyle \sum_{k \mathop = 1}^{27} \left({6 k - 5}\right) = 27 \left({3 \times 27 - 2}\right)$