825565530 has 32 divisors (see below), whose sum is σ = 1984466304. Its totient is φ = 219805376.

The previous prime is 825565501. The next prime is 825565547. The reversal of 825565530 is 35565528.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1857 + ... + 40676.

It is an arithmetic number, because the mean of its divisors is an integer number (62014572).

Almost surely, 2^825565530 is an apocalyptic number.

825565530 is an abundant number, since it is smaller than the sum of its proper divisors (1158900774).

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

825565530 is a wasteful number, since it uses less digits than its factorization.

825565530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43190.

The product of its (nonzero) digits is 180000, while the sum is 39.

The square root of 825565530 is about 28732.6561598471. The cubic root of 825565530 is about 938.1029834663.

The spelling of 825565530 in words is "eight hundred twenty-five million, five hundred sixty-five thousand, five hundred thirty".