# 505

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

What does the number 505 look like?

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

505 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 505:

### 5 × 101

See below for interesting mathematical facts about the number 505 from the Numbermatics database.

### Names of 505

• Cardinal: 505 can be written as Five hundred five.

### Scientific notation

• Scientific notation: 5.05 × 102

### Factors of 505

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 106

### Divisors of 505

• Number of divisors d(n): 4
• Complete list of divisors:
• Sum of all divisors σ(n): 612
• Sum of proper divisors (its aliquot sum) s(n): 107
• 505 is a deficient number, because the sum of its proper divisors (107) is less than itself. Its deficiency is 398

### Bases of 505

• Binary: 1111110012
• Base-36: E1

### Squares and roots of 505

• 505 squared (5052) is 255025
• 505 cubed (5053) is 128787625
• The square root of 505 is 22.4722050543
• The cube root of 505 is 7.9633742415

### Scales and comparisons

How big is 505?
• 505 seconds is equal to 8 minutes, 25 seconds.
• To count from 1 to 505 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 505 cubic inches would be around 0.7 feet tall.

### Recreational maths with 505

• 505 is the same when its digits are reversed! That makes it a palindromic number.
• The number of decimal digits it has is: 3
• The sum of 505's digits is 10
• More coming soon!