25513938 has 24 divisors (see below), whose sum is σ = 56040348. Its totient is φ = 8387712.

The previous prime is 25513937. The next prime is 25513949. The reversal of 25513938 is 83931552.

It can be written as a sum of positive squares in 2 ways, for example, as 22781529 + 2732409 = 4773^2 + 1653^2 .

It is a super-2 number, since 2×25513938² = 1301922064535688, which contains 22 as substring.

It is a Curzon number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (25513937) 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, 8395 + ... + 11022.

Almost surely, 2^25513938 is an apocalyptic number.

25513938 is an abundant number, since it is smaller than the sum of its proper divisors (30526410).

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

25513938 is a wasteful number, since it uses less digits than its factorization.

25513938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19498 (or 19495 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 25513938 is about 5051.1323482958. The cubic root of 25513938 is about 294.3918833542.

The spelling of 25513938 in words is "twenty-five million, five hundred thirteen thousand, nine hundred thirty-eight".