50081 has 4 divisors (see below), whose sum is σ = 50964. Its totient is φ = 49200.

The previous prime is 50077. The next prime is 50087. The reversal of 50081 is 18005.

50081 = T₆ + T₇ + ... + T₆₆.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6400 + 43681 = 80^2 + 209^2 .

It is a cyclic number.

It is not a de Polignac number, because 50081 - 2² = 50077 is a prime.

It is a super-2 number, since 2×50081² = 5016213122, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (50087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 350 + ... + 471.

It is an arithmetic number, because the mean of its divisors is an integer number (12741).

2⁵⁰⁰⁸¹ is an apocalyptic number.

It is an amenable number.

50081 is a deficient number, since it is larger than the sum of its proper divisors (883).

50081 is an equidigital number, since it uses as much as digits as its factorization.

50081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 882.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 50081 is about 223.7878459613. The cubic root of 50081 is about 36.8601980235.

Adding to 50081 its reverse (18005), we get a palindrome (68086).

The spelling of 50081 in words is "fifty thousand, eighty-one".