23566261 has 2 divisors, whose sum is σ = 23566262. Its totient is φ = 23566260.

The previous prime is 23566243. The next prime is 23566307. The reversal of 23566261 is 16266532.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21298225 + 2268036 = 4615^2 + 1506^2 .

It is a cyclic number.

It is not a de Polignac number, because 23566261 - 2⁷ = 23566133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23566861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11783130 + 11783131.

It is an arithmetic number, because the mean of its divisors is an integer number (11783131).

Almost surely, 2^23566261 is an apocalyptic number.

It is an amenable number.

23566261 is a deficient number, since it is larger than the sum of its proper divisors (1).

23566261 is an equidigital number, since it uses as much as digits as its factorization.

23566261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 31.

The square root of 23566261 is about 4854.5093469886. The cubic root of 23566261 is about 286.7016733585.

The spelling of 23566261 in words is "twenty-three million, five hundred sixty-six thousand, two hundred sixty-one".