320320425 has 24 divisors (see below), whose sum is σ = 552625344. Its totient is φ = 163408960.

The previous prime is 320320387. The next prime is 320320513. The reversal of 320320425 is 524023023.

It is not a de Polignac number, because 320320425 - 2¹³ = 320312233 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91122 + ... + 94571.

It is an arithmetic number, because the mean of its divisors is an integer number (23026056).

Almost surely, 2^320320425 is an apocalyptic number.

It is an amenable number.

320320425 is a deficient number, since it is larger than the sum of its proper divisors (232304919).

320320425 is a wasteful number, since it uses less digits than its factorization.

320320425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185729 (or 185724 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 320320425 is about 17897.4977301298. The cubic root of 320320425 is about 684.2186021132.

Adding to 320320425 its reverse (524023023), we get a palindrome (844343448).

The spelling of 320320425 in words is "three hundred twenty million, three hundred twenty thousand, four hundred twenty-five".