The Number
181
One Hundred and Eighty-One
Nearby Numbers
Positive, nonzero integers within three units
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.
0.0055248618784530384
The reciprocal of 181.
Palindrome?
A numerical palindrome has the same value when all of its digits are reversed.
The number 181 is 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 10 Decimal
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 number one hundred and eighty-one has the following 1 prime factor:
Prime Factorization
The prime factorization of a positive integer is the unique list of prime factors together with their multiplicities
1811
= 181
Base Conversions
The number one hundred and eighty-one in 35 different bases