25823321 has 2 divisors, whose sum is σ = 25823322. Its totient is φ = 25823320.

The previous prime is 25823309. The next prime is 25823327. The reversal of 25823321 is 12332852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23377225 + 2446096 = 4835^2 + 1564^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25823321 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (25823327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12911660 + 12911661.

It is an arithmetic number, because the mean of its divisors is an integer number (12911661).

Almost surely, 2^25823321 is an apocalyptic number.

It is an amenable number.

25823321 is a deficient number, since it is larger than the sum of its proper divisors (1).

25823321 is an equidigital number, since it uses as much as digits as its factorization.

25823321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 26.

The square root of 25823321 is about 5081.6651798402. The cubic root of 25823321 is about 295.5770415523.

The spelling of 25823321 in words is "twenty-five million, eight hundred twenty-three thousand, three hundred twenty-one".