# 81223

## 81,223 is a prime number. Like all primes greater than two, it is odd and has no factors apart from itself and one.

What does the number 81223 look like?

As a prime, it is not composed of any other numbers and has no internal structure.

81223 is a prime number. Like all primes (except two), it is an odd number.

## Prime factorization of 81223:

### 81223

See below for interesting mathematical facts about the number 81223 from the Numbermatics database.

### Names of 81223

• Cardinal: 81223 can be written as Eighty-one thousand, two hundred twenty-three.

### Scientific notation

• Scientific notation: 8.1223 × 104

### Factors of 81223

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 81223

### Divisors of 81223

• Number of divisors d(n): 2
• Complete list of divisors:
• Sum of all divisors σ(n): 81224
• Sum of proper divisors (its aliquot sum) s(n): 1
• 81223 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 81222

### Bases of 81223

• Binary: 100111101010001112
• Base-36: 1QO7

### Squares and roots of 81223

• 81223 squared (812232) is 6597175729
• 81223 cubed (812233) is 535842404236567
• The square root of 81223 is 284.9964912065
• The cube root of 81223 is 43.3071571035

### Scales and comparisons

How big is 81223?
• 81,223 seconds is equal to 22 hours, 33 minutes, 43 seconds.
• To count from 1 to 81,223 would take you about twenty-two hours.

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 81223 cubic inches would be around 3.6 feet tall.

### Recreational maths with 81223

• 81223 backwards is 32218
• The number of decimal digits it has is: 5
• The sum of 81223's digits is 16
• More coming soon!