305

Number
$305$ (three hundred and five) is:


 * $5 \times 61$


 * The $17$th integer after $7, 13, 19, 35, 38, 41, 57, 65, 70, 125, 130, 190, 205, 223, 253, 285$ the decimal representation of whose square can be split into two parts which are each themselves square:
 * $305^2 = 93 \, 025; 9 = 3^2, 3025 = 55^2$