331240043 has 4 divisors (see below), whose sum is σ = 345641808. Its totient is φ = 316838280.

The previous prime is 331240033. The next prime is 331240099. The reversal of 331240043 is 340042133.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 331240043 - 2²⁰ = 330191467 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 331239997 and 331240024.

It is not an unprimeable number, because it can be changed into a prime (331240033) 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 3 ways as a sum of consecutive naturals, for example, 7200848 + ... + 7200893.

It is an arithmetic number, because the mean of its divisors is an integer number (86410452).

Almost surely, 2^331240043 is an apocalyptic number.

331240043 is a deficient number, since it is larger than the sum of its proper divisors (14401765).

331240043 is a wasteful number, since it uses less digits than its factorization.

331240043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14401764.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 331240043 is about 18200.0011813186. The cubic root of 331240043 is about 691.9068190381.

Adding to 331240043 its reverse (340042133), we get a palindrome (671282176).

The spelling of 331240043 in words is "three hundred thirty-one million, two hundred forty thousand, forty-three".