331231032 has 160 divisors (see below), whose sum is σ = 1045440000. Its totient is φ = 97070400.

The previous prime is 331231031. The next prime is 331231057. The reversal of 331231032 is 230132133.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 331230996 and 331231014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331231031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 220219 + ... + 221717.

It is an arithmetic number, because the mean of its divisors is an integer number (6534000).

Almost surely, 2^331231032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 331231032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (522720000).

331231032 is an abundant number, since it is smaller than the sum of its proper divisors (714208968).

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

331231032 is a wasteful number, since it uses less digits than its factorization.

331231032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1559 (or 1546 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 331231032 is about 18199.7536247060. The cubic root of 331231032 is about 691.9005448078.

Adding to 331231032 its reverse (230132133), we get a palindrome (561363165).

The spelling of 331231032 in words is "three hundred thirty-one million, two hundred thirty-one thousand, thirty-two".