The Number

21861

Twenty-One Thousand Eight Hundred and Sixty-One

In Base 22 Duovigesimal Is

213f22

The numbers with a 22 subscript use Base 22 Duovigesimal notation.

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

Nearby Numbers

Positive, nonzero integers within three units

21858
213c22
Twenty-One Thousand Eight Hundred and Fifty-Eight in Base 22 Duovigesimal
21859
213d22
Twenty-One Thousand Eight Hundred and Fifty-Nine in Base 22 Duovigesimal
21860
213e22
Twenty-One Thousand Eight Hundred and Sixty in Base 22 Duovigesimal
21862
213g22
Twenty-One Thousand Eight Hundred and Sixty-Two in Base 22 Duovigesimal
21863
213h22
Twenty-One Thousand Eight Hundred and Sixty-Three in Base 22 Duovigesimal
21864
213i22
Twenty-One Thousand Eight Hundred and Sixty-Four in Base 22 Duovigesimal

Scientific Notation

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

2.1861e4

Reciprocal

A number multiplied with its reciprocal is one.

0.000afg8hji2ke5j22

The reciprocal of 21861 in Base 22 Duovigesimal.

Palindrome?

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

The number 213f22 is not a palindrome.

Not A Prime Number

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

Twenty-one thousand eight hundred and sixty-one is a composite number with 12 total factors (including 1 and itself).   See primes in Base 22 Duovigesimal

A Composite

Composites have more than just these two factors.

Twenty-one thousand eight hundred and sixty-one is a composite number with 12 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-one thousand eight hundred and sixty-one has the following 3 prime factors:

3
322
Three in Base 22 Duovigesimal
7
722
Seven in Base 22 Duovigesimal
347
fh22
Three Hundred and Forty-Seven in Base 22 Duovigesimal

Prime Factorization

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

3222 · 7221 · fh221 = 213f22

Base Conversions

The number twenty-one thousand eight hundred and sixty-one in 35 different bases