25708231 has 2 divisors, whose sum is σ = 25708232. Its totient is φ = 25708230.

The previous prime is 25708223. The next prime is 25708253. The reversal of 25708231 is 13280752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25708231 - 2³ = 25708223 is a prime.

It is a super-2 number, since 2×25708231² = 1321826282298722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25708231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25708211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12854115 + 12854116.

It is an arithmetic number, because the mean of its divisors is an integer number (12854116).

Almost surely, 2^25708231 is an apocalyptic number.

25708231 is a deficient number, since it is larger than the sum of its proper divisors (1).

25708231 is an equidigital number, since it uses as much as digits as its factorization.

25708231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 25708231 is about 5070.3284903446. The cubic root of 25708231 is about 295.1372759547.

Adding to 25708231 its reverse (13280752), we get a palindrome (38988983).

It can be divided in two parts, 2570 and 8231, that added together give a palindrome (10801).

The spelling of 25708231 in words is "twenty-five million, seven hundred eight thousand, two hundred thirty-one".