What is the significance of the timestamp 2147483647 in PHP and how can it be converted to a readable date format?

The timestamp 2147483647 represents the maximum value for a 32-bit signed integer in PHP, which corresponds to the date of January 19, 2038. To convert this timestamp to a readable date format, you can use the `date()` function in PHP with the 'Y-m-d H:i:s' format specifier.

$timestamp = 2147483647;
$date = date('Y-m-d H:i:s', $timestamp);
echo $date;