# 351

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

What does the number 351 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 8 divisors.

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

## Prime factorization of 351:

### 33 × 13

(3 × 3 × 3 × 13)

See below for interesting mathematical facts about the number 351 from the Numbermatics database.

### Names of 351

• Cardinal: 351 can be written as Three hundred fifty-one.

### Scientific notation

• Scientific notation: 3.51 × 102

### Factors of 351

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 16

### Divisors of 351

• Number of divisors d(n): 8
• Complete list of divisors:
• Sum of all divisors σ(n): 560
• Sum of proper divisors (its aliquot sum) s(n): 209
• 351 is a deficient number, because the sum of its proper divisors (209) is less than itself. Its deficiency is 142

### Bases of 351

• Binary: 1010111112
• Base-36: 9R

### Squares and roots of 351

• 351 squared (3512) is 123201
• 351 cubed (3513) is 43243551
• The square root of 351 is 18.7349939951
• The cube root of 351 is 7.0540040631

### Scales and comparisons

How big is 351?
• 351 seconds is equal to 5 minutes, 51 seconds.
• To count from 1 to 351 would take you about two 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 351 cubic inches would be around 0.6 feet tall.

### Recreational maths with 351

• 351 backwards is 153
• 351 is a Harshad number.
• The number of decimal digits it has is: 3
• The sum of 351's digits is 9
• More coming soon!