25521648 has 20 divisors (see below), whose sum is σ = 65931048. Its totient is φ = 8507200.

The previous prime is 25521647. The next prime is 25521667. The reversal of 25521648 is 84612552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25521647) 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 3 ways as a sum of consecutive naturals, for example, 265803 + ... + 265898.

Almost surely, 2^25521648 is an apocalyptic number.

It is an amenable number.

25521648 is an abundant number, since it is smaller than the sum of its proper divisors (40409400).

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

25521648 is a wasteful number, since it uses less digits than its factorization.

25521648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531712 (or 531706 counting only the distinct ones).

The product of its digits is 19200, while the sum is 33.

The square root of 25521648 is about 5051.8954858548. The cubic root of 25521648 is about 294.4215342432.

The spelling of 25521648 in words is "twenty-five million, five hundred twenty-one thousand, six hundred forty-eight".