331223232 has 28 divisors (see below), whose sum is σ = 876361976. Its totient is φ = 110407680.

The previous prime is 331223209. The next prime is 331223237. The reversal of 331223232 is 232322133.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 331223199 and 331223208.

It is not an unprimeable number, because it can be changed into a prime (331223237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 862369 + ... + 862752.

It is an arithmetic number, because the mean of its divisors is an integer number (31298642).

Almost surely, 2^331223232 is an apocalyptic number.

331223232 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

331223232 is an abundant number, since it is smaller than the sum of its proper divisors (545138744).

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

331223232 is a wasteful number, since it uses less digits than its factorization.

331223232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1725136 (or 1725126 counting only the distinct ones).

The product of its digits is 1296, while the sum is 21.

The square root of 331223232 is about 18199.5393348293. The cubic root of 331223232 is about 691.8951136877.

Adding to 331223232 its reverse (232322133), we get a palindrome (563545365).

The spelling of 331223232 in words is "three hundred thirty-one million, two hundred twenty-three thousand, two hundred thirty-two".