The Number

6561

Six Thousand Five Hundred and Sixty-One

In Base 21 Unovigesimal Is

ei921

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

For more familiar numbers: See Six Thousand Five Hundred and Sixty-One in Base 10 Decimal

Nearby Numbers

Positive, nonzero integers within three units

6558
ei621
Six Thousand Five Hundred and Fifty-Eight in Base 21 Unovigesimal
6559
ei721
Six Thousand Five Hundred and Fifty-Nine in Base 21 Unovigesimal
6560
ei821
Six Thousand Five Hundred and Sixty in Base 21 Unovigesimal
6562
eia21
Six Thousand Five Hundred and Sixty-Two in Base 21 Unovigesimal
6563
eib21
Six Thousand Five Hundred and Sixty-Three in Base 21 Unovigesimal
6564
eic21
Six Thousand Five Hundred and Sixty-Four in Base 21 Unovigesimal

Scientific Notation

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

6.561e3

Reciprocal

A number multiplied with its reciprocal is one.

0.0018da27000000121

The reciprocal of 6561 in Base 21 Unovigesimal.

Palindrome?

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

The number ei921 is not a palindrome.

Not A Prime Number

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

Six thousand five hundred and sixty-one is a composite number with 9 total factors (including 1 and itself).   See primes in Base 21 Unovigesimal

A Composite

Composites have more than just these two factors.

Six thousand five hundred and sixty-one is a composite number with 9 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 six thousand five hundred and sixty-one has the following 1 prime factor:

3
321
Three in Base 21 Unovigesimal

Prime Factorization

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

3218 = ei921

Base Conversions

The number six thousand five hundred and sixty-one in 35 different bases