# 215

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

What does the number 215 look like?

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

215 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 215:

### 5 × 43

See below for interesting mathematical facts about the number 215 from the Numbermatics database.

### Names of 215

• Cardinal: 215 can be written as Two hundred fifteen.

### Scientific notation

• Scientific notation: 2.15 × 102

### Factors of 215

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 48

### Divisors of 215

• Number of divisors d(n): 4
• Complete list of divisors:
• Sum of all divisors σ(n): 264
• Sum of proper divisors (its aliquot sum) s(n): 49
• 215 is a deficient number, because the sum of its proper divisors (49) is less than itself. Its deficiency is 166

### Bases of 215

• Binary: 110101112
• Base-36: 5Z

### Squares and roots of 215

• 215 squared (2152) is 46225
• 215 cubed (2153) is 9938375
• The square root of 215 is 14.6628782987
• The cube root of 215 is 5.9907264149

### Scales and comparisons

How big is 215?
• 215 seconds is equal to 3 minutes, 35 seconds.
• To count from 1 to 215 would take you about forty-seven 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 215 cubic inches would be around 0.5 feet tall.

### Recreational maths with 215

• 215 backwards is 512
• The number of decimal digits it has is: 3
• The sum of 215's digits is 8
• More coming soon!