25559543 has 2 divisors, whose sum is σ = 25559544. Its totient is φ = 25559542.

The previous prime is 25559537. The next prime is 25559623. The reversal of 25559543 is 34595552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25559543 - 2¹⁴ = 25543159 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25559497 and 25559506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25559843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12779771 + 12779772.

It is an arithmetic number, because the mean of its divisors is an integer number (12779772).

Almost surely, 2^25559543 is an apocalyptic number.

25559543 is a deficient number, since it is larger than the sum of its proper divisors (1).

25559543 is an equidigital number, since it uses as much as digits as its factorization.

25559543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 135000, while the sum is 38.

The square root of 25559543 is about 5055.6446671023. The cubic root of 25559543 is about 294.5671829685.

The spelling of 25559543 in words is "twenty-five million, five hundred fifty-nine thousand, five hundred forty-three".