562

562 = 2 x 281.

562!/265! - 1 is a prime.

562 is the maximum number of regions into which 33 lines divide a plane. 562 is also the maximum number of regions a circle can be cut into by joining 11 points on the circumference with straight lines.

562 is the sum of 12 consecutive primes: 562 = 23 + 29 + 31 + 37 + 41 + 43 + 47 + 53 + 59 + 61 + 67 + 71.

562 is a Smith number.

562 has a representation as a sum of two squares: 562 = 11² + 21².

Source: Prime Curios!