25381536 has 24 divisors (see below), whose sum is σ = 66626784. Its totient is φ = 8460480.

The previous prime is 25381523. The next prime is 25381553. The reversal of 25381536 is 63518352.

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 25381497 and 25381506.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132100 + ... + 132291.

It is an arithmetic number, because the mean of its divisors is an integer number (2776116).

Almost surely, 2^25381536 is an apocalyptic number.

It is an amenable number.

25381536 is an abundant number, since it is smaller than the sum of its proper divisors (41245248).

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

25381536 is a wasteful number, since it uses less digits than its factorization.

25381536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264404 (or 264396 counting only the distinct ones).

The product of its digits is 21600, while the sum is 33.

The square root of 25381536 is about 5038.0091305991. The cubic root of 25381536 is about 293.8817609595.

Adding to 25381536 its reverse (63518352), we get a palindrome (88899888).

The spelling of 25381536 in words is "twenty-five million, three hundred eighty-one thousand, five hundred thirty-six".