# 2f21

The numbers with a 21 subscript use Base 21 Unovigesimal notation.

For more familiar numbers: See Fifty-Seven in Base 10 Decimal

## Nearby Numbers

Positive, nonzero integers within three units

54
2c21
Fifty-Four in Base 21 Unovigesimal
55
2d21
Fifty-Five in Base 21 Unovigesimal
56
2e21
Fifty-Six in Base 21 Unovigesimal
58
2g21
Fifty-Eight in Base 21 Unovigesimal
59
2h21
Fifty-Nine in Base 21 Unovigesimal
60
2i21
Sixty in Base 21 Unovigesimal

## 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.

### `0.07f9jigc36d5b21`

The reciprocal of 57 in Base 21 Unovigesimal.

## Palindrome?

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

The number 2f21 is not a palindrome.

## Not A Prime Number

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

Fifty-seven is a composite number with 4 total factors (including 1 and itself).   See primes in Base 21 Unovigesimal

## A Composite

Composites have more than just these two factors.

Fifty-seven is a composite number with 4 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 fifty-seven has the following 2 prime factors:

3
321
Three in Base 21 Unovigesimal
19
j21
Nineteen in Base 21 Unovigesimal

## Prime Factorization

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

## Base Conversions

The number fifty-seven in 35 different bases