25705523 has 2 divisors, whose sum is σ = 25705524. Its totient is φ = 25705522.

The previous prime is 25705517. The next prime is 25705531. The reversal of 25705523 is 32550752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25705523 - 2⁴ = 25705507 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (25705543) 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, 12852761 + 12852762.

It is an arithmetic number, because the mean of its divisors is an integer number (12852762).

Almost surely, 2^25705523 is an apocalyptic number.

25705523 is a deficient number, since it is larger than the sum of its proper divisors (1).

25705523 is an equidigital number, since it uses as much as digits as its factorization.

25705523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10500, while the sum is 29.

The square root of 25705523 is about 5070.0614394699. The cubic root of 25705523 is about 295.1269127392.

The spelling of 25705523 in words is "twenty-five million, seven hundred five thousand, five hundred twenty-three".