The word '520' appears to be a typo or a miscommunication, as it does not correspond to an English word. If we interpret '520' as a typo for the phrase "I love you" in Chinese internet slang, it holds a special meaning. This phrase has become popular in online communication due to the phonetic similarity of "520" to "I love you" when spoken in Mandarin.
The number "520" is derived from the pronunciation of the numbers in Mandarin Chinese. The digit "5" is pronounced as "wǔ," "2" as "èr," and "0" as "líng," which together sounds similar to "wǒ ài nǐ," meaning "I love you."