320523525 has 72 divisors (see below), whose sum is σ = 694759104. Its totient is φ = 137894400.

The previous prime is 320523499. The next prime is 320523557. The reversal of 320523525 is 525325023.

It is not a de Polignac number, because 320523525 - 2⁷ = 320523397 is a prime.

It is a Curzon number.

It is a congruent number.

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 71 ways as a sum of consecutive naturals, for example, 20790 + ... + 32760.

It is an arithmetic number, because the mean of its divisors is an integer number (9649432).

Almost surely, 2^320523525 is an apocalyptic number.

320523525 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

320523525 is an abundant number, since it is smaller than the sum of its proper divisors (374235579).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

320523525 is a wasteful number, since it uses less digits than its factorization.

320523525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12011 (or 12003 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 27.

The square root of 320523525 is about 17903.1708085467. The cubic root of 320523525 is about 684.3631817563.

Adding to 320523525 its reverse (525325023), we get a palindrome (845848548).

The spelling of 320523525 in words is "three hundred twenty million, five hundred twenty-three thousand, five hundred twenty-five".