25931 has 2 divisors, whose sum is σ = 25932.
Its totient is φ = 25930.
The previous prime is 25919. The next prime is 25933. The reversal of 25931 is 13952.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 25931 - 26 = 25867 is a prime.
It is a super-2 number, since 2×259312 = 1344833522, which contains 22 as substring.
Together with 25933, it forms a pair of twin primes.
It is a Chen prime.
It is a nialpdrome in base 14.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 25931.
It is not a weakly prime, because it can be changed into another prime (25933) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12965 + 12966.
It is an arithmetic number, because the mean of its divisors is an integer number (12966).
225931 is an apocalyptic number.
25931 is a deficient number, since it is larger than the sum of its proper divisors (1).
25931 is an equidigital number, since it uses as much as digits as its factorization.
25931 is an evil number, because the sum of its binary digits is even.
The product of its digits is 270, while the sum is 20.
The square root of 25931 is about 161.0310529060.
The cubic root of 25931 is about 29.5987307710.
The spelling of 25931 in words is "twenty-five thousand, nine hundred thirty-one".