25520530 has 32 divisors (see below), whose sum is σ = 53623296. Its totient is φ = 8562624.

The previous prime is 25520527. The next prime is 25520557. The reversal of 25520530 is 3502552.

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 15 ways as a sum of consecutive naturals, for example, 589 + ... + 7168.

It is an arithmetic number, because the mean of its divisors is an integer number (1675728).

Almost surely, 2^25520530 is an apocalyptic number.

25520530 is an abundant number, since it is smaller than the sum of its proper divisors (28102766).

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

25520530 is a wasteful number, since it uses less digits than its factorization.

25520530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7818.

The product of its (nonzero) digits is 1500, while the sum is 22.

The square root of 25520530 is about 5051.7848331060. The cubic root of 25520530 is about 294.4172350422.

The spelling of 25520530 in words is "twenty-five million, five hundred twenty thousand, five hundred thirty".