23112581 has 2 divisors, whose sum is σ = 23112582. Its totient is φ = 23112580.

The previous prime is 23112563. The next prime is 23112589. The reversal of 23112581 is 18521132.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18232900 + 4879681 = 4270^2 + 2209^2 .

It is a cyclic number.

It is not a de Polignac number, because 23112581 - 2¹⁴ = 23096197 is a prime.

It is a super-2 number, since 2×23112581² = 1068382800963122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23112589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11556290 + 11556291.

It is an arithmetic number, because the mean of its divisors is an integer number (11556291).

Almost surely, 2^23112581 is an apocalyptic number.

It is an amenable number.

23112581 is a deficient number, since it is larger than the sum of its proper divisors (1).

23112581 is an equidigital number, since it uses as much as digits as its factorization.

23112581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 480, while the sum is 23.

The square root of 23112581 is about 4807.5545758733. The cubic root of 23112581 is about 284.8499507674.

The spelling of 23112581 in words is "twenty-three million, one hundred twelve thousand, five hundred eighty-one".