320256625 has 32 divisors (see below), whose sum is σ = 455783328. Its totient is φ = 222566400.

The previous prime is 320256613. The next prime is 320256631. The reversal of 320256625 is 526652023.

It can be written as a sum of positive squares in 16 ways, for example, as 153536881 + 166719744 = 12391^2 + 12912^2 .

It is not a de Polignac number, because 320256625 - 2⁵ = 320256593 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21829 + ... + 33421.

It is an arithmetic number, because the mean of its divisors is an integer number (14243229).

Almost surely, 2^320256625 is an apocalyptic number.

It is an amenable number.

320256625 is a deficient number, since it is larger than the sum of its proper divisors (135526703).

320256625 is a wasteful number, since it uses less digits than its factorization.

320256625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11638 (or 11628 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 320256625 is about 17895.7152693040. The cubic root of 320256625 is about 684.1731725559.

The spelling of 320256625 in words is "three hundred twenty million, two hundred fifty-six thousand, six hundred twenty-five".