# 218

## 218 is an even composite number composed of two prime numbers multiplied together.

What does the number 218 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 4 divisors.

218 is an even composite number. It is composed of two distinct prime numbers multiplied together. It has a total of four divisors.

## Prime factorization of 218:

### 2 × 109

See below for interesting mathematical facts about the number 218 from the Numbermatics database.

### Names of 218

• Cardinal: 218 can be written as Two hundred eighteen.

### Scientific notation

• Scientific notation: 2.18 × 102

### Factors of 218

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 111

### Divisors of 218

• Number of divisors d(n): 4
• Complete list of divisors:
• Sum of all divisors σ(n): 330
• Sum of proper divisors (its aliquot sum) s(n): 112
• 218 is a deficient number, because the sum of its proper divisors (112) is less than itself. Its deficiency is 106

### Bases of 218

• Binary: 110110102
• Base-36: 62

### Squares and roots of 218

• 218 squared (2182) is 47524
• 218 cubed (2183) is 10360232
• The square root of 218 is 14.7648230601
• The cube root of 218 is 6.0184616549

### Scales and comparisons

How big is 218?
• 218 seconds is equal to 3 minutes, 38 seconds.
• To count from 1 to 218 would take you about forty-nine seconds.

This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 218 cubic inches would be around 0.5 feet tall.

### Recreational maths with 218

• 218 backwards is 812
• The number of decimal digits it has is: 3
• The sum of 218's digits is 11
• More coming soon!