25506855 has 36 divisors (see below), whose sum is σ = 48444552. Its totient is φ = 12312480.

The previous prime is 25506847. The next prime is 25506881. The reversal of 25506855 is 55860552.

It is not a de Polignac number, because 25506855 - 2³ = 25506847 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 112252 + ... + 112478.

It is an arithmetic number, because the mean of its divisors is an integer number (1345682).

Almost surely, 2^25506855 is an apocalyptic number.

25506855 is a deficient number, since it is larger than the sum of its proper divisors (22937697).

25506855 is a wasteful number, since it uses less digits than its factorization.

25506855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476 (or 246 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 36.

The square root of 25506855 is about 5050.4311697121. The cubic root of 25506855 is about 294.3646384983.

The spelling of 25506855 in words is "twenty-five million, five hundred six thousand, eight hundred fifty-five".