55,225

Number
$55 \, 225$ (fifty-five thousand, two hundred and twenty-five) is:


 * $5^2 \times 47^2$


 * The $21$st square after $1$, $4$, $9$, $16$, $25$, $\ldots$, $441$, $484$, $676$, $1444$, $7744$, $11 \, 881$, $29 \, 929$, $44 \, 944$ which has no more than $2$ distinct digits and does not end in $0$:
 * $55 \, 225 = 235^2$


 * The $235$th square number:
 * $55 \, 225 = 235 \times 235$