25500550 has 24 divisors (see below), whose sum is σ = 47876400. Its totient is φ = 10104480.

The previous prime is 25500539. The next prime is 25500557. The reversal of 25500550 is 5500552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25500557) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 3111 + ... + 7789.

It is an arithmetic number, because the mean of its divisors is an integer number (1994850).

Almost surely, 2^25500550 is an apocalyptic number.

25500550 is a deficient number, since it is larger than the sum of its proper divisors (22375850).

25500550 is a wasteful number, since it uses less digits than its factorization.

25500550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4800 (or 4795 counting only the distinct ones).

The product of its (nonzero) digits is 1250, while the sum is 22.

The square root of 25500550 is about 5049.8069270023. The cubic root of 25500550 is about 294.3403819864.

The spelling of 25500550 in words is "twenty-five million, five hundred thousand, five hundred fifty".