2223

Number
$2223$ (two thousand, two hundred and twenty-three) is:


 * $3^2 \times 13 \times 19$


 * The $9$th Kaprekar number after $1, 9, 45, 55, 99, 297, 703, 999$:
 * $2223^2 = 4 \, 941 \, 729 \to 494 + 1729 = 2223$