5253

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Number

$5253$ (five thousand, two hundred and fifty-three) is:

$3 \times 17 \times 103$

The $102$nd triangular number after $1$, $3$, $6$, $10$, $15$, $\ldots$, $4560$, $4656$, $4753$, $4851$, $4950$, $5050$, $5151$:

$5253 = \ds \sum_{k \mathop = 1}^{102} k = \dfrac {102 \times \paren {102 + 1} } 2$

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