This number is a prime.
Pope Adrian VI, the only Dutch Pope and the last non-Italian to be elected before John Paul II in 1978, died apparently poisoned in the prime year 1523.
Experts say that 15:23 is the most likely time to encroach on sweets. [Gudipati]
The positive even digits concatenated in increasing order (2468) minus the product of all odd digits (1*3*5*7*9). [Homewood]