1951

Number
$1951$ (one thousand, nine hundred and fifty-one) is:


 * The $297$th prime number


 * The $26$th centered hexagonal number after $1, 7, 19, 37, 61, 91, 127, \ldots, 817, 919, 1027, 1141, 1261, 1387, 1519, 1657, 1801$:
 * $1951= \displaystyle 1 + \sum_{k \mathop = 1}^{26 - 1} 6 k = 26^3 - 25^3$