The Number 55Prime Factors of 55=5x11.
55 is a Fibonacci Number.
55 is a Triangular Number.
55 is a Heptagonal Number.
55 is a Centered Nonagonal Number.
55 is a Centered 18-gonal Number.
55 is a Square Pyramidal Number.
Caesium is a soft, silver-white, metallic element with atomic number 55. It is a very reactive element, exploding on contact with water and reacting instantly with air.
"The Ancient Chinese believed that "the sum total of heavenly numbers and earthly numbers is 55. It is this...which sets the gods and demons in movement."
The Year 55 ADIn the year 55 AD King Nicander II of Hellas died. He was succeeded by Pausanias III.
In the year 55 AD King Vologeses of Parthia was killed in battle against the Kushans. He was succeeded by his son, who reigns as King Mithridates III.