# 213

## 213 is an odd composite number composed of two prime numbers multiplied together.

What does the number 213 look like?

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

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

## Prime factorization of 213:

### 3 × 71

See below for interesting mathematical facts about the number 213 from the Numbermatics database.

### Names of 213

• Cardinal: 213 can be written as Two hundred thirteen.

### Scientific notation

• Scientific notation: 2.13 × 102

### Factors of 213

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 74

### Divisors of 213

• Number of divisors d(n): 4
• Complete list of divisors:
• Sum of all divisors σ(n): 288
• Sum of proper divisors (its aliquot sum) s(n): 75
• 213 is a deficient number, because the sum of its proper divisors (75) is less than itself. Its deficiency is 138

### Bases of 213

• Binary: 110101012
• Base-36: 5X

### Squares and roots of 213

• 213 squared (2132) is 45369
• 213 cubed (2133) is 9663597
• The square root of 213 is 14.5945195193
• The cube root of 213 is 5.9720926199

### Scales and comparisons

How big is 213?
• 213 seconds is equal to 3 minutes, 33 seconds.
• To count from 1 to 213 would take you about forty-six 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 213 cubic inches would be around 0.5 feet tall.

### Recreational maths with 213

• 213 backwards is 312
• The number of decimal digits it has is: 3
• The sum of 213's digits is 6
• More coming soon!