The Number

221821

Two Hundred and Twenty-One Thousand Eight Hundred and Twenty-One

In Base 18 Octodecimal Is

220b718

The numbers with a 18 subscript use Base 18 Octodecimal notation.

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

Nearby Numbers

Positive, nonzero integers within three units

221818
220b418
Two Hundred and Twenty-One Thousand Eight Hundred and Eightteen in Base 18 Octodecimal
221819
220b518
Two Hundred and Twenty-One Thousand Eight Hundred and Nineteen in Base 18 Octodecimal
221820
220b618
Two Hundred and Twenty-One Thousand Eight Hundred and Twenty in Base 18 Octodecimal
221822
220b818
Two Hundred and Twenty-One Thousand Eight Hundred and Twenty-Two in Base 18 Octodecimal
221823
220b918
Two Hundred and Twenty-One Thousand Eight Hundred and Twenty-Three in Base 18 Octodecimal
221824
220ba18
Two Hundred and Twenty-One Thousand Eight Hundred and Twenty-Four in Base 18 Octodecimal

Scientific Notation

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

2.21821e5

Reciprocal

A number multiplied with its reciprocal is one.

0.0000895h962ace7a918

The reciprocal of 221821 in Base 18 Octodecimal.

Palindrome?

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

The number 220b718 is not a palindrome.

Not A Prime Number

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

Two hundred and twenty-one thousand eight hundred and twenty-one is a composite number with 4 total factors (including 1 and itself).   See primes in Base 18 Octodecimal

A Composite

Composites have more than just these two factors.

Two hundred and twenty-one thousand eight hundred and twenty-one 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 two hundred and twenty-one thousand eight hundred and twenty-one has the following 2 prime factors:

29
1b18
Twenty-Nine in Base 18 Octodecimal
7649
15ah18
Seven Thousand Six Hundred and Forty-Nine in Base 18 Octodecimal

Prime Factorization

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

1b181 · 15ah181 = 220b718

Base Conversions

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