475

Number
$475$ (four hundred and seventy-five) is:


 * $5^2 \times 19$


 * The $21$st integer after $7$, $13$, $19$, $35$, $38$, $\ldots$, $223$, $253$, $285$, $305$, $350$, $380$, $410$ the decimal representation of whose square can be split into two parts which are each themselves square:
 * $475^2 = 225 \, 625$; $225 = 15^2$, $625 = 25^2$