25881523 has 2 divisors, whose sum is σ = 25881524. Its totient is φ = 25881522.

The previous prime is 25881517. The next prime is 25881533. The reversal of 25881523 is 32518852.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25881523 - 2¹⁷ = 25750451 is a prime.

It is not a weakly prime, because it can be changed into another prime (25881533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12940761 + 12940762.

It is an arithmetic number, because the mean of its divisors is an integer number (12940762).

Almost surely, 2^25881523 is an apocalyptic number.

25881523 is a deficient number, since it is larger than the sum of its proper divisors (1).

25881523 is an equidigital number, since it uses as much as digits as its factorization.

25881523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19200, while the sum is 34.

The square root of 25881523 is about 5087.3886228595. The cubic root of 25881523 is about 295.7989374456.

The spelling of 25881523 in words is "twenty-five million, eight hundred eighty-one thousand, five hundred twenty-three".