328521825 has 60 divisors (see below), whose sum is σ = 620220348. Its totient is φ = 171849600.

The previous prime is 328521793. The next prime is 328521841. The reversal of 328521825 is 528125823.

It can be written as a sum of positive squares in 6 ways, for example, as 21150801 + 307371024 = 4599^2 + 17532^2 .

It is not a de Polignac number, because 328521825 - 2⁵ = 328521793 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 328521825.

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 59 ways as a sum of consecutive naturals, for example, 105795 + ... + 108855.

Almost surely, 2^328521825 is an apocalyptic number.

It is an amenable number.

328521825 is a deficient number, since it is larger than the sum of its proper divisors (291698523).

328521825 is a wasteful number, since it uses less digits than its factorization.

328521825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3136 (or 3122 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 328521825 is about 18125.1710336758. The cubic root of 328521825 is about 690.0089790892.

The spelling of 328521825 in words is "three hundred twenty-eight million, five hundred twenty-one thousand, eight hundred twenty-five".