23265821 has 2 divisors, whose sum is σ = 23265822. Its totient is φ = 23265820.

The previous prime is 23265797. The next prime is 23265829. The reversal of 23265821 is 12856232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19802500 + 3463321 = 4450^2 + 1861^2 .

It is a cyclic number.

It is not a de Polignac number, because 23265821 - 2²² = 19071517 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23265829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11632910 + 11632911.

It is an arithmetic number, because the mean of its divisors is an integer number (11632911).

Almost surely, 2^23265821 is an apocalyptic number.

It is an amenable number.

23265821 is a deficient number, since it is larger than the sum of its proper divisors (1).

23265821 is an equidigital number, since it uses as much as digits as its factorization.

23265821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 29.

The square root of 23265821 is about 4823.4656627782. The cubic root of 23265821 is about 285.4780976999.

The spelling of 23265821 in words is "twenty-three million, two hundred sixty-five thousand, eight hundred twenty-one".