331990841 has 16 divisors (see below), whose sum is σ = 432641664. Its totient is φ = 247221504.

The previous prime is 331990741. The next prime is 331990847. The reversal of 331990841 is 148099133.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331990841 is a prime.

It is a super-2 number, since 2×331990841² = 220435837015774562, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 331990795 and 331990804.

It is not an unprimeable number, because it can be changed into a prime (331990847) 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, 105755 + ... + 108848.

It is an arithmetic number, because the mean of its divisors is an integer number (27040104).

Almost surely, 2^331990841 is an apocalyptic number.

It is an amenable number.

331990841 is a deficient number, since it is larger than the sum of its proper divisors (100650823).

331990841 is a wasteful number, since it uses less digits than its factorization.

331990841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214640.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 331990841 is about 18220.6158238409. The cubic root of 331990841 is about 692.4291897169.

The spelling of 331990841 in words is "three hundred thirty-one million, nine hundred ninety thousand, eight hundred forty-one".