320343512 has 32 divisors (see below), whose sum is σ = 657914400. Its totient is φ = 145549824.

The previous prime is 320343497. The next prime is 320343533. The reversal of 320343512 is 215343023.

320343512 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36668 + ... + 44555.

It is an arithmetic number, because the mean of its divisors is an integer number (20559825).

Almost surely, 2^320343512 is an apocalyptic number.

It is an amenable number.

320343512 is an abundant number, since it is smaller than the sum of its proper divisors (337570888).

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

320343512 is a wasteful number, since it uses less digits than its factorization.

320343512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81275 (or 81271 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 320343512 is about 17898.1426969393. The cubic root of 320343512 is about 684.2350400029.

Adding to 320343512 its reverse (215343023), we get a palindrome (535686535).

The spelling of 320343512 in words is "three hundred twenty million, three hundred forty-three thousand, five hundred twelve".