23536561 has 2 divisors, whose sum is σ = 23536562. Its totient is φ = 23536560.

The previous prime is 23536553. The next prime is 23536607. The reversal of 23536561 is 16563532.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18447025 + 5089536 = 4295^2 + 2256^2 .

It is a cyclic number.

It is not a de Polignac number, because 23536561 - 2³ = 23536553 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23536511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11768280 + 11768281.

It is an arithmetic number, because the mean of its divisors is an integer number (11768281).

Almost surely, 2^23536561 is an apocalyptic number.

It is an amenable number.

23536561 is a deficient number, since it is larger than the sum of its proper divisors (1).

23536561 is an equidigital number, since it uses as much as digits as its factorization.

23536561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16200, while the sum is 31.

The square root of 23536561 is about 4851.4493710643. The cubic root of 23536561 is about 286.5811816195.

The spelling of 23536561 in words is "twenty-three million, five hundred thirty-six thousand, five hundred sixty-one".