The Number

181

One Hundred and Eighty-One

In Base 11 Undecimal Is

15511

The numbers with a 11 subscript use Base 11 Undecimal notation.

For more familiar numbers: See One Hundred and Eighty-One in Base 10 Decimal

Nearby Numbers

Positive, nonzero integers within three units

178
15211
One Hundred and Seventy-Eight in Base 11 Undecimal
179
15311
One Hundred and Seventy-Nine in Base 11 Undecimal
180
15411
One Hundred and Eighty in Base 11 Undecimal
182
15611
One Hundred and Eighty-Two in Base 11 Undecimal
183
15711
One Hundred and Eighty-Three in Base 11 Undecimal
184
15811
One Hundred and Eighty-Four in Base 11 Undecimal

Scientific Notation

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

1.81e2

Reciprocal

A number multiplied with its reciprocal is one.

0.0073986a234488a2a511

The reciprocal of 181 in Base 11 Undecimal.

Palindrome?

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

The number 15511 is not a palindrome.

A Prime Number

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

One hundred and eighty-one is the 42nd prime number.   See primes in Base 11 Undecimal

Not A Composite

Composites have more than just these two factors.

One Hundred and Eighty-One is not a composite number because it has exactly two factors: One and One Hundred and Eighty-One

Prime Factors

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

The number one hundred and eighty-one has the following 1 prime factor:

181
15511
One Hundred and Eighty-One in Base 11 Undecimal

Prime Factorization

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

155111 = 15511

Base Conversions

The number one hundred and eighty-one in 35 different bases