263

Number
$263$ (two hundred and sixty-three) is:


 * The $56$th prime number


 * The $7$th balanced prime after $5, 53, 157, 173, 211, 257$:
 * $263 = \dfrac {257 + 269} 2$


 * The $41$st happy number after $1, 7, 10, 13, 19, 23, \ldots, 188, 190, 192, 193, 203, 208, 219, 226, 230, 236, 239, 262$:
 * $263 \to 2^2 + 6^2 + 3^2 = 4 + 36 + 9 = 49 \to 4^2 + 9^2 = 16 + 81 = 97 \to 9^2 + 7^2 = 81 + 49 = 130 \to 1^2 + 3^2 + 0^2 = 1 + 9 + 0 = 10 \to 1^2 + 0^2 = 1$