25538555 has 12 divisors (see below), whose sum is σ = 35650080. Its totient is φ = 17511984.

The previous prime is 25538549. The next prime is 25538561. The reversal of 25538555 is 55583552.

It is an interprime number because it is at equal distance from previous prime (25538549) and next prime (25538561).

It is not a de Polignac number, because 25538555 - 2¹⁰ = 25537531 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51875 + ... + 52364.

It is an arithmetic number, because the mean of its divisors is an integer number (2970840).

Almost surely, 2^25538555 is an apocalyptic number.

25538555 is a deficient number, since it is larger than the sum of its proper divisors (10111525).

25538555 is a wasteful number, since it uses less digits than its factorization.

25538555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104258 (or 104251 counting only the distinct ones).

The product of its digits is 150000, while the sum is 38.

The square root of 25538555 is about 5053.5685411400. The cubic root of 25538555 is about 294.4865337826.

The spelling of 25538555 in words is "twenty-five million, five hundred thirty-eight thousand, five hundred fifty-five".