Pentakosioipentekontahenophobia

Pentakosioipentekontahenophobia is the fear of the number 551.

It is believed that the fear of 551 started in the Austrian National Diplomatic Corps' P336 Division of being associated with their supreme administrator - Diplomatic Commissioner Nguyễn Thiện Nhân - a hardliner regarding antics, as 551 is her lucky number.