331004213 has 6 divisors (see below), whose sum is σ = 331921302. Its totient is φ = 330089480.

The previous prime is 331004209. The next prime is 331004237. The reversal of 331004213 is 312400133.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 330039889 + 964324 = 18167^2 + 982^2 .

It is not a de Polignac number, because 331004213 - 2² = 331004209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 331004191 and 331004200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331004203) 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 5 ways as a sum of consecutive naturals, for example, 240395 + ... + 241767.

It is an arithmetic number, because the mean of its divisors is an integer number (55320217).

Almost surely, 2^331004213 is an apocalyptic number.

It is an amenable number.

331004213 is a deficient number, since it is larger than the sum of its proper divisors (917089).

331004213 is an frugal number, since it uses more digits than its factorization.

331004213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2355 (or 1864 counting only the distinct ones).

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

The square root of 331004213 is about 18193.5211820032. The cubic root of 331004213 is about 691.7425764915.

Adding to 331004213 its reverse (312400133), we get a palindrome (643404346).

The spelling of 331004213 in words is "three hundred thirty-one million, four thousand, two hundred thirteen".