320131312 has 10 divisors (see below), whose sum is σ = 620254448. Its totient is φ = 160065648.

The previous prime is 320131307. The next prime is 320131333. The reversal of 320131312 is 213131023.

It is a Harshad number since it is a multiple of its sum of digits (16), and also a Moran number because the ratio is a prime number: 20008207 = 320131312 / (3 + 2 + 0 + 1 + 3 + 1 + 3 + 1 + 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10004088 + ... + 10004119.

Almost surely, 2^320131312 is an apocalyptic number.

It is an amenable number.

320131312 is a deficient number, since it is larger than the sum of its proper divisors (300123136).

320131312 is a wasteful number, since it uses less digits than its factorization.

320131312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20008215 (or 20008209 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 320131312 is about 17892.2137255288. The cubic root of 320131312 is about 684.0839243603.

Adding to 320131312 its reverse (213131023), we get a palindrome (533262335).

The spelling of 320131312 in words is "three hundred twenty million, one hundred thirty-one thousand, three hundred twelve".