555 is a spheric number. It is the product of three distinct prime numbers.
555 is 2323 in base 6 and 676 in base 9.
The sum of the digits of 555 is five times the number of digits: 5 + 5 + 5 = 3 x 5 = 15.
In North America, telephone numbers with the prefix 555 are widely used for fictitious telephone numbers in television shows, films, computer games, and other media.
Source: Wikipedia
In North America, telephone numbers with the prefix 555 are widely used for fictitious telephone numbers in television shows, films, computer games, and other media.
Source: Wikipedia
