# The Number 55: Properties and Meanings

Prime Factors of**55**=5x11.

**55**can be Partitioned 28 times with each term no larger than 2.

**55**can be Partitioned 280 times with each term no larger than 3.

**55**can be Partitioned 1495 times with each term no larger than 4.

**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.

**55**is the largest Triangular Number in the Fibonacci Sequence.

the sum of 5 successive Triangular Number (3+6+10+15+21 =

**55**)

Sum of the two series of following numbers: 1, 2, 4, 8 and 1, 3, 9, 27=

**55**.

Sum of the first 5 Square Numbers = 1 + 4 + 9 + 16 + 25 =

**55**

Sum of the 8 factors of 36 = 1 + 2 + 3 + 4 + 6 + 9 + 12 + 18 =

**55**

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 Chemical Element Manganese has one Stable Isotope. It has

**55**neutrons.

"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 AD

In 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.