331220404 has 6 divisors (see below), whose sum is σ = 579635714. Its totient is φ = 165610200.

The previous prime is 331220389. The next prime is 331220413. The reversal of 331220404 is 404022133.

It can be written as a sum of positive squares in only one way, i.e., 204432804 + 126787600 = 14298^2 + 11260^2 .

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, 41402547 + ... + 41402554.

Almost surely, 2^331220404 is an apocalyptic number.

It is an amenable number.

331220404 is a deficient number, since it is larger than the sum of its proper divisors (248415310).

331220404 is a wasteful number, since it uses less digits than its factorization.

331220404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82805105 (or 82805103 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 331220404 is about 18199.4616403893. The cubic root of 331220404 is about 691.8931445374.

Adding to 331220404 its reverse (404022133), we get a palindrome (735242537).

It can be divided in two parts, 3312 and 20404, that added together give a square (23716 = 154²).

The spelling of 331220404 in words is "three hundred thirty-one million, two hundred twenty thousand, four hundred four".