25555505 has 16 divisors (see below), whose sum is σ = 33267024. Its totient is φ = 18769920.

The previous prime is 25555499. The next prime is 25555529. The reversal of 25555505 is 50555552.

It can be written as a sum of positive squares in 8 ways, for example, as 7134241 + 18421264 = 2671^2 + 4292^2 .

It is not a de Polignac number, because 25555505 - 2⁴ = 25555489 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 182 + ... + 7151.

It is an arithmetic number, because the mean of its divisors is an integer number (2079189).

Almost surely, 2^25555505 is an apocalyptic number.

It is an amenable number.

25555505 is a deficient number, since it is larger than the sum of its proper divisors (7711519).

25555505 is a wasteful number, since it uses less digits than its factorization.

25555505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7396.

The product of its (nonzero) digits is 31250, while the sum is 32.

The square root of 25555505 is about 5055.2452957300. The cubic root of 25555505 is about 294.5516698465.

The spelling of 25555505 in words is "twenty-five million, five hundred fifty-five thousand, five hundred five".