# 1515

The numbers with a 15 subscript use Base 15 Quindecimal notation.

For more familiar numbers: See Twenty in Base 10 Decimal

## Nearby Numbers

Positive, nonzero integers within three units

17
1215
Seventeen in Base 15 Quindecimal
18
1315
Eightteen in Base 15 Quindecimal
19
1415
Nineteen in Base 15 Quindecimal
21
1615
Twenty-One in Base 15 Quindecimal
22
1715
Twenty-Two in Base 15 Quindecimal
23
1815
Twenty-Three in Base 15 Quindecimal

## Scientific Notation

Scientific notation expresses a quantity as the product of its significand with 10 raised to an integer exponent.

## Reciprocal

A number multiplied with its reciprocal is one.

### `0.0b3b3b3b3b3b3b415`

The reciprocal of 20 in Base 15 Quindecimal.

## Palindrome?

A numerical palindrome has the same value when all of its digits are reversed.

The number 1515 is not a palindrome.

## Not A Prime Number

A prime number is a positive integer that is divisible only by itself and one.

Twenty is a composite number with 6 total factors (including 1 and itself).   See primes in Base 15 Quindecimal

## A Composite

Composites have more than just these two factors.

Twenty is a composite number with 6 total factors (including 1 and itself).

## Prime Factors

The prime factors of a positive integer are the integers that divide it exactly and are also prime.

The number twenty has the following 2 prime factors:

2
215
Two in Base 15 Quindecimal
5
515
Five in Base 15 Quindecimal

## Prime Factorization

The prime factorization of a positive integer is the unique list of prime factors together with their multiplicities

## Base Conversions

The number twenty in 35 different bases