25864831 has 2 divisors, whose sum is σ = 25864832. Its totient is φ = 25864830.

The previous prime is 25864823. The next prime is 25864841. The reversal of 25864831 is 13846852.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25864831 - 2³ = 25864823 is a prime.

It is a super-3 number, since 3×25864831³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25864841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12932415 + 12932416.

It is an arithmetic number, because the mean of its divisors is an integer number (12932416).

Almost surely, 2^25864831 is an apocalyptic number.

25864831 is a deficient number, since it is larger than the sum of its proper divisors (1).

25864831 is an equidigital number, since it uses as much as digits as its factorization.

25864831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46080, while the sum is 37.

The square root of 25864831 is about 5085.7478309488. The cubic root of 25864831 is about 295.7353330266.

The spelling of 25864831 in words is "twenty-five million, eight hundred sixty-four thousand, eight hundred thirty-one".