3,544,453

Number
$3 \, 544 \, 453$ (three million, five hundred and forty-four thousand, four hundred and fifty-three) is:


 * $11^3 \times 2663$


 * The $9$th palindromic triangular number after $0$, $1$, $3$, $6$, $66$, $3003$, $66 \, 066$, $617 \, 716$ whose index is itself palindromic:
 * $3 \, 544 \, 453 = T_{2662}$


 * The $19$th palindromic triangular number after $0$, $1$, $3$, $6$, $55$, $66$, $171$, $595$, $666$, $3003$, $5995$, $8778$, $15 \, 051$, $66 \, 066$, $617 \, 716$, $828 \, 828$, $1 \, 269 \, 621$, $1 \, 680 \, 861$:
 * $3 \, 544 \, 453 = \dfrac {2662 \times \paren {2662 + 1} } 2$


 * The $2662$nd triangular number:
 * $3 \, 544 \, 453 = \dfrac {2662 \times \paren {2662 + 1} } 2$