25481536 has 14 divisors (see below), whose sum is σ = 50565050. Its totient is φ = 12740736.

The previous prime is 25481531. The next prime is 25481543. The reversal of 25481536 is 63518452.

It can be written as a sum of positive squares in only one way, i.e., 19009600 + 6471936 = 4360^2 + 2544^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25481531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199011 + ... + 199138.

Almost surely, 2^25481536 is an apocalyptic number.

It is an amenable number.

25481536 is a deficient number, since it is larger than the sum of its proper divisors (25083514).

25481536 is an equidigital number, since it uses as much as digits as its factorization.

25481536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398161 (or 398151 counting only the distinct ones).

The product of its digits is 28800, while the sum is 34.

The square root of 25481536 is about 5047.9239296962. The cubic root of 25481536 is about 294.2672073608.

Adding to 25481536 its reverse (63518452), we get a palindrome (88999988).

The spelling of 25481536 in words is "twenty-five million, four hundred eighty-one thousand, five hundred thirty-six".