# 555

## 555 is an odd composite number composed of three prime numbers multiplied together.

What does the number 555 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 8 divisors.

555 is an odd composite number. It is composed of three distinct prime numbers multiplied together. It has a total of eight divisors.

## Prime factorization of 555:

### 3 × 5 × 37

See below for interesting mathematical facts about the number 555 from the Numbermatics database.

### Names of 555

• Cardinal: 555 can be written as Five hundred fifty-five.

### Scientific notation

• Scientific notation: 5.55 × 102

### Factors of 555

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 45

### Divisors of 555

• Number of divisors d(n): 8
• Complete list of divisors:
• Sum of all divisors σ(n): 912
• Sum of proper divisors (its aliquot sum) s(n): 357
• 555 is a deficient number, because the sum of its proper divisors (357) is less than itself. Its deficiency is 198

### Bases of 555

• Binary: 10001010112
• Base-36: FF

### Squares and roots of 555

• 555 squared (5552) is 308025
• 555 cubed (5553) is 170953875
• The square root of 555 is 23.5584379789
• The cube root of 555 is 8.2179657647

### Scales and comparisons

How big is 555?
• 555 seconds is equal to 9 minutes, 15 seconds.
• To count from 1 to 555 would take you about four minutes.

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 555 cubic inches would be around 0.7 feet tall.

### Recreational maths with 555

• 555 is the same when its digits are reversed! That makes it a palindromic number.
• 555 is a Harshad number.
• The number of decimal digits it has is: 3
• The sum of 555's digits is 15
• More coming soon!