25636231 has 2 divisors, whose sum is σ = 25636232. Its totient is φ = 25636230.

The previous prime is 25636229. The next prime is 25636243. The reversal of 25636231 is 13263652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25636231 - 2¹ = 25636229 is a prime.

It is a super-2 number, since 2×25636231² = 1314432679770722, which contains 22 as substring.

Together with 25636229, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 25636231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25631231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12818115 + 12818116.

It is an arithmetic number, because the mean of its divisors is an integer number (12818116).

Almost surely, 2^25636231 is an apocalyptic number.

25636231 is a deficient number, since it is larger than the sum of its proper divisors (1).

25636231 is an equidigital number, since it uses as much as digits as its factorization.

25636231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 28.

The square root of 25636231 is about 5063.2233804169. The cubic root of 25636231 is about 294.8614920019.

Adding to 25636231 its reverse (13263652), we get a palindrome (38899883).

The spelling of 25636231 in words is "twenty-five million, six hundred thirty-six thousand, two hundred thirty-one".