4371

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Number

$4371$ (four thousand, three hundred and seventy-one) is:

$3 \times 31 \times 47$

The $15$th Poulet number after $341$, $561$, $645$, $1105$, $1387$, $1729$, $1905$, $2047$, $2465$, $2701$, $2821$, $3277$, $4033$, $4369$:

$2^{4371} \equiv 2 \pmod {4371}$: $4371 = 3 \times 31 \times 47$

The $47$th hexagonal number after $1$, $6$, $15$, $28$, $45$, $66$, $91$, $\ldots$, $2145$, $2278$, $2415$, $2556$, $2701$, $2850$, $3003$, $3160$, $3321$, $3486$, $3655$, $3828$, $4005$, $4186$:

$4371 = \ds \sum_{k \mathop = 1}^{47} \paren {4 k - 3} = 47 \paren {2 \times 47 - 1}$

The $93$nd triangular number after $1$, $3$, $6$, $10$, $15$, $\ldots$, $3655$, $3741$, $3828$, $3916$, $4005$, $4095$, $4186$, $4278$:

$4371 = \ds \sum_{k \mathop = 1}^{93} k = \dfrac {93 \times \paren {93 + 1} } 2$

Also see

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