25533559 has 2 divisors, whose sum is σ = 25533560. Its totient is φ = 25533558.

The previous prime is 25533551. The next prime is 25533617. The reversal of 25533559 is 95533552.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25533559 - 2³ = 25533551 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25533551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12766779 + 12766780.

It is an arithmetic number, because the mean of its divisors is an integer number (12766780).

Almost surely, 2^25533559 is an apocalyptic number.

25533559 is a deficient number, since it is larger than the sum of its proper divisors (1).

25533559 is an equidigital number, since it uses as much as digits as its factorization.

25533559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 101250, while the sum is 37.

The square root of 25533559 is about 5053.0742127936. The cubic root of 25533559 is about 294.4673294766.

The spelling of 25533559 in words is "twenty-five million, five hundred thirty-three thousand, five hundred fifty-nine".