"451" refers to the title of the dystopian novel "Fahrenheit 451," written by Ray Bradbury. The story is set in a future society where books are banned, and "firemen" burn any that are found. The title symbolizes the temperature at which paper supposedly ignites and burns, highlighting the theme of censorship and the suppression of ideas. The protagonist, Guy Montag, is a fireman who becomes disillusioned with his society's anti-book stance. As he encounters individuals who cherish literature, Montag begins to question the value of knowledge and the consequences of a conformist culture. The novel explores themes of individuality, freedom of thought, and the impact of technology on society.