331321032 has 48 divisors (see below), whose sum is σ = 1025519040. Its totient is φ = 94663008.

The previous prime is 331321021. The next prime is 331321033. The reversal of 331321032 is 230123133.

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 = 331320996 and 331321014.

It is not an unprimeable number, because it can be changed into a prime (331321033) 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 11 ways as a sum of consecutive naturals, for example, 328188 + ... + 329195.

It is an arithmetic number, because the mean of its divisors is an integer number (21364980).

Almost surely, 2^331321032 is an apocalyptic number.

It is an amenable number.

331321032 is an abundant number, since it is smaller than the sum of its proper divisors (694198008).

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

331321032 is a wasteful number, since it uses less digits than its factorization.

331321032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657402 (or 657395 counting only the distinct ones).

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

The square root of 331321032 is about 18202.2260177155. The cubic root of 331321032 is about 691.9632054122.

Adding to 331321032 its reverse (230123133), we get a palindrome (561444165).

The spelling of 331321032 in words is "three hundred thirty-one million, three hundred twenty-one thousand, thirty-two".