25603231 has 2 divisors, whose sum is σ = 25603232. Its totient is φ = 25603230.

The previous prime is 25603211. The next prime is 25603243. The reversal of 25603231 is 13230652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25603231 - 2⁵ = 25603199 is a prime.

It is a super-2 number, since 2×25603231² = 1311050875278722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25603211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12801615 + 12801616.

It is an arithmetic number, because the mean of its divisors is an integer number (12801616).

Almost surely, 2^25603231 is an apocalyptic number.

25603231 is a deficient number, since it is larger than the sum of its proper divisors (1).

25603231 is an equidigital number, since it uses as much as digits as its factorization.

25603231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 25603231 is about 5059.9635374180. The cubic root of 25603231 is about 294.7349184381.

Adding to 25603231 its reverse (13230652), we get a palindrome (38833883).

The spelling of 25603231 in words is "twenty-five million, six hundred three thousand, two hundred thirty-one".