The Number
281
Two Hundred and Eighty-One
In Base 7 Septenary Is
5517
The numbers with a 7 subscript use Base 7 Septenary notation.
For more familiar numbers: See Two Hundred and Eighty-One in Base 10 Decimal
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.
2.81e2
Reciprocal
A number multiplied with its reciprocal is one.
0.001135452066553121467
The reciprocal of 281 in Base 7 Septenary.
Palindrome?
A numerical palindrome has the same value when all of its digits are reversed.
The number 5517 is not a palindrome.
A Prime Number
A prime number is a positive integer that is divisible only by itself and one.
Two hundred and eighty-one is the 60th prime number. See primes in Base 7 Septenary
Not A Composite
Composites have more than just these two factors.
Two Hundred and Eighty-One is not a composite number because it has exactly two factors: One and Two Hundred and Eighty-One
Prime Factors
The number two 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
55171
= 5517
Base Conversions
The number two hundred and eighty-one in 35 different bases