# The Number 55: Properties and Meanings

Prime Factors of

**55**=

5x

11.

**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.