331313243421 has 16 divisors (see below), whose sum is σ = 461764892160. Its totient is φ = 210902184240.

The previous prime is 331313243419. The next prime is 331313243441. The reversal of 331313243421 is 124342313133.

It is not a de Polignac number, because 331313243421 - 2¹ = 331313243419 is a prime.

It is a super-2 number, since 2×331313243421² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331313243441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4165191 + ... + 4243988.

It is an arithmetic number, because the mean of its divisors is an integer number (28860305760).

Almost surely, 2^331313243421 is an apocalyptic number.

It is an amenable number.

331313243421 is a deficient number, since it is larger than the sum of its proper divisors (130451648739).

331313243421 is a wasteful number, since it uses less digits than its factorization.

331313243421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8409776.

The product of its digits is 15552, while the sum is 30.

Adding to 331313243421 its reverse (124342313133), we get a palindrome (455655556554).

The spelling of 331313243421 in words is "three hundred thirty-one billion, three hundred thirteen million, two hundred forty-three thousand, four hundred twenty-one".