331334021 has 8 divisors (see below), whose sum is σ = 345992064. Its totient is φ = 316697040.

The previous prime is 331334011. The next prime is 331334023. The reversal of 331334021 is 120433133.

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 331334021 - 2¹⁰ = 331332997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 331333984 and 331334002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331334023) 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, 32840 + ... + 41726.

It is an arithmetic number, because the mean of its divisors is an integer number (43249008).

Almost surely, 2^331334021 is an apocalyptic number.

It is an amenable number.

331334021 is a deficient number, since it is larger than the sum of its proper divisors (14658043).

331334021 is a wasteful number, since it uses less digits than its factorization.

331334021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10531.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 331334021 is about 18202.5828112386. The cubic root of 331334021 is about 691.9722477928.

Adding to 331334021 its reverse (120433133), we get a palindrome (451767154).

The spelling of 331334021 in words is "three hundred thirty-one million, three hundred thirty-four thousand, twenty-one".