2,245,319

Number
$2 \, 245 \, 319$ (two million, two hundred and forty-five thousand, three hundred and nineteen) is:


 * The $165 \, 760$th prime number


 * The $2$nd term of the smallest Cunningham chain of the first kind of length $7$:
 * $1 \, 122 \, 659$, $2 \, 245 \, 319$, $4 \, 490 \, 639$, $8 \, 981 \, 279$, $17 \, 962 \, 559$, $35 \, 925 \, 119$, $71 \, 850 \, 239$