25644231 has 12 divisors (see below), whose sum is σ = 37189152. Its totient is φ = 17028096.

The previous prime is 25644197. The next prime is 25644251. The reversal of 25644231 is 13244652.

It is not a de Polignac number, because 25644231 - 2¹⁵ = 25611463 is a prime.

It is a super-2 number, since 2×25644231² = 1315253167162722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25644195 and 25644204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25644251) 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 in 11 ways as a sum of consecutive naturals, for example, 3231 + ... + 7856.

It is an arithmetic number, because the mean of its divisors is an integer number (3099096).

Almost surely, 2^25644231 is an apocalyptic number.

25644231 is a deficient number, since it is larger than the sum of its proper divisors (11544921).

25644231 is a wasteful number, since it uses less digits than its factorization.

25644231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11350 (or 11347 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 25644231 is about 5064.0133293663. The cubic root of 25644231 is about 294.8921601425.

Adding to 25644231 its reverse (13244652), we get a palindrome (38888883).

The spelling of 25644231 in words is "twenty-five million, six hundred forty-four thousand, two hundred thirty-one".