25881533 has 2 divisors, whose sum is σ = 25881534. Its totient is φ = 25881532.

The previous prime is 25881523. The next prime is 25881547. The reversal of 25881533 is 33518852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18335524 + 7546009 = 4282^2 + 2747^2 .

It is a cyclic number.

It is not a de Polignac number, because 25881533 - 2⁴ = 25881517 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25881493 and 25881502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25881523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12940766 + 12940767.

It is an arithmetic number, because the mean of its divisors is an integer number (12940767).

Almost surely, 2^25881533 is an apocalyptic number.

It is an amenable number.

25881533 is a deficient number, since it is larger than the sum of its proper divisors (1).

25881533 is an equidigital number, since it uses as much as digits as its factorization.

25881533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28800, while the sum is 35.

The square root of 25881533 is about 5087.3896056819. The cubic root of 25881533 is about 295.7989755422.

The spelling of 25881533 in words is "twenty-five million, eight hundred eighty-one thousand, five hundred thirty-three".