320323525 has 12 divisors (see below), whose sum is σ = 399643072. Its totient is φ = 254683440.

The previous prime is 320323517. The next prime is 320323547. The reversal of 320323525 is 525323023.

It is not a de Polignac number, because 320323525 - 2³ = 320323517 is a prime.

It is a super-4 number, since 4×320323525⁴ (a number of 35 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 320323525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35229 + ... + 43378.

Almost surely, 2^320323525 is an apocalyptic number.

It is an amenable number.

320323525 is a deficient number, since it is larger than the sum of its proper divisors (79319547).

320323525 is a wasteful number, since it uses less digits than its factorization.

320323525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78780 (or 78775 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 25.

The square root of 320323525 is about 17897.5843342056. The cubic root of 320323525 is about 684.2208093518.

Adding to 320323525 its reverse (525323023), we get a palindrome (845646548).

The spelling of 320323525 in words is "three hundred twenty million, three hundred twenty-three thousand, five hundred twenty-five".