258,474,216
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Number
$258 \, 474 \, 216$ is:
- $2^3 \times 3 \times 7^2 \times 11 \times 13 \times 29 \times 53$
- The $6$th and largest triangular number after $6$, $120$, $210$, $990$, $185 \, 136$ which can be expressed as the product of $3$ consecutive integers:
- $258 \, 474 \, 216 = T_{22 \, 736} = 636 \times 637 \times 638$
- The $22 \, 736$th triangular number:
- $258 \, 474 \, 216 = \ds \sum_{k \mathop = 1}^{22 \, 736} k = \dfrac {22 \, 736 \times \paren {22 \, 736 + 1} } 2$
Also see
- Previous: Triangular Numbers which are Product of 3 Consecutive Integers
- Previous ... Next: Triangular Number
Sources
- 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $258,474,216$