320550625 has 20 divisors (see below), whose sum is σ = 408159972. Its totient is φ = 251576000.

The previous prime is 320550617. The next prime is 320550641. The reversal of 320550625 is 526055023.

It can be written as a sum of positive squares in 10 ways, for example, as 184525056 + 136025569 = 13584^2 + 11663^2 .

It is not a de Polignac number, because 320550625 - 2³ = 320550617 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320550593 and 320550602.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 28287 + ... + 37963.

Almost surely, 2^320550625 is an apocalyptic number.

It is an amenable number.

320550625 is a deficient number, since it is larger than the sum of its proper divisors (87609347).

320550625 is an frugal number, since it uses more digits than its factorization.

320550625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9750 (or 9735 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 320550625 is about 17903.9276417215. The cubic root of 320550625 is about 684.3824686605.

The spelling of 320550625 in words is "three hundred twenty million, five hundred fifty thousand, six hundred twenty-five".