23081 has 2 divisors, whose sum is σ = 23082. Its totient is φ = 23080.

The previous prime is 23071. The next prime is 23087. The reversal of 23081 is 18032.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19600 + 3481 = 140^2 + 59^2 .

It is a cyclic number.

It is not a de Polignac number, because 23081 - 2⁶ = 23017 is a prime.

It is a super-2 number, since 2×23081² = 1065465122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23087) 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 as a sum of consecutive naturals, namely, 11540 + 11541.

It is an arithmetic number, because the mean of its divisors is an integer number (11541).

2²³⁰⁸¹ is an apocalyptic number.

It is an amenable number.

23081 is a deficient number, since it is larger than the sum of its proper divisors (1).

23081 is an equidigital number, since it uses as much as digits as its factorization.

23081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 23081 is about 151.9243232666. The cubic root of 23081 is about 28.4720152099.

The spelling of 23081 in words is "twenty-three thousand, eighty-one".