331440043 has 16 divisors (see below), whose sum is σ = 384161760. Its totient is φ = 283046400.

The previous prime is 331440029. The next prime is 331440049. The reversal of 331440043 is 340044133.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331440043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 331439996 and 331440023.

It is not an unprimeable number, because it can be changed into a prime (331440049) 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 15 ways as a sum of consecutive naturals, for example, 2238 + ... + 25843.

It is an arithmetic number, because the mean of its divisors is an integer number (24010110).

Almost surely, 2^331440043 is an apocalyptic number.

331440043 is a deficient number, since it is larger than the sum of its proper divisors (52721717).

331440043 is a wasteful number, since it uses less digits than its factorization.

331440043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28158.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 331440043 is about 18205.4948573226. The cubic root of 331440043 is about 692.0460468930.

Adding to 331440043 its reverse (340044133), we get a palindrome (671484176).

The spelling of 331440043 in words is "three hundred thirty-one million, four hundred forty thousand, forty-three".