331085905921 has 8 divisors (see below), whose sum is σ = 334730776320. Its totient is φ = 327451232208.

The previous prime is 331085905889. The next prime is 331085905949. The reversal of 331085905921 is 129509580133.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 331085905921 - 2⁵ = 331085905889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331085903921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2483866 + ... + 2613763.

It is an arithmetic number, because the mean of its divisors is an integer number (41841347040).

Almost surely, 2^331085905921 is an apocalyptic number.

It is an amenable number.

331085905921 is a deficient number, since it is larger than the sum of its proper divisors (3644870399).

331085905921 is a wasteful number, since it uses less digits than its factorization.

331085905921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5098343.

The product of its (nonzero) digits is 291600, while the sum is 46.

The spelling of 331085905921 in words is "three hundred thirty-one billion, eighty-five million, nine hundred five thousand, nine hundred twenty-one".