320131232 has 24 divisors (see below), whose sum is σ = 651993300. Its totient is φ = 154545664.

The previous prime is 320131219. The next prime is 320131277. The reversal of 320131232 is 232131023.

It can be written as a sum of positive squares in 2 ways, for example, as 278088976 + 42042256 = 16676^2 + 6484^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 320131232.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171557 + ... + 173412.

Almost surely, 2^320131232 is an apocalyptic number.

320131232 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

320131232 is an abundant number, since it is smaller than the sum of its proper divisors (331862068).

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

320131232 is a wasteful number, since it uses less digits than its factorization.

320131232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345008 (or 345000 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 320131232 is about 17892.2114899193. The cubic root of 320131232 is about 684.0838673767.

Adding to 320131232 its reverse (232131023), we get a palindrome (552262255).

The spelling of 320131232 in words is "three hundred twenty million, one hundred thirty-one thousand, two hundred thirty-two".