25631226 has 12 divisors (see below), whose sum is σ = 55534362. Its totient is φ = 8543736.

The previous prime is 25631219. The next prime is 25631227. The reversal of 25631226 is 62213652.

25631226 is a `hidden beast` number, since 2 + 5 + 631 + 2 + 26 = 666.

It can be written as a sum of positive squares in only one way, i.e., 14402025 + 11229201 = 3795^2 + 3351^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 25631226.

It is not an unprimeable number, because it can be changed into a prime (25631227) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 711961 + ... + 711996.

Almost surely, 2^25631226 is an apocalyptic number.

25631226 is an abundant number, since it is smaller than the sum of its proper divisors (29903136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25631226 is a wasteful number, since it uses less digits than its factorization.

25631226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1423965 (or 1423962 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 25631226 is about 5062.7291059270. The cubic root of 25631226 is about 294.8423020019.

Adding to 25631226 its reverse (62213652), we get a palindrome (87844878).

The spelling of 25631226 in words is "twenty-five million, six hundred thirty-one thousand, two hundred twenty-six".