320025321 has 72 divisors (see below), whose sum is σ = 602806464. Its totient is φ = 161663040.

The previous prime is 320025317. The next prime is 320025331. The reversal of 320025321 is 123520023.

320025321 is a `hidden beast` number, since 320 + 0 + 25 + 321 = 666.

It is not a de Polignac number, because 320025321 - 2² = 320025317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 320025294 and 320025303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320025301) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 178596 + ... + 180378.

It is an arithmetic number, because the mean of its divisors is an integer number (8372312).

Almost surely, 2^320025321 is an apocalyptic number.

It is an amenable number.

320025321 is a deficient number, since it is larger than the sum of its proper divisors (282781143).

320025321 is a wasteful number, since it uses less digits than its factorization.

320025321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1851 (or 1841 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 320025321 is about 17889.2515494640. The cubic root of 320025321 is about 684.0084191536.

Adding to 320025321 its reverse (123520023), we get a palindrome (443545344).

The spelling of 320025321 in words is "three hundred twenty million, twenty-five thousand, three hundred twenty-one".