331243043 has 4 divisors (see below), whose sum is σ = 334282080. Its totient is φ = 328204008.

The previous prime is 331243039. The next prime is 331243067. The reversal of 331243043 is 340342133.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 340342133 = 73 ⋅4662221.

It is a cyclic number.

It is not a de Polignac number, because 331243043 - 2² = 331243039 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331243013) 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, 1519355 + ... + 1519572.

It is an arithmetic number, because the mean of its divisors is an integer number (83570520).

Almost surely, 2^331243043 is an apocalyptic number.

331243043 is a deficient number, since it is larger than the sum of its proper divisors (3039037).

331243043 is a wasteful number, since it uses less digits than its factorization.

331243043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3039036.

The product of its (nonzero) digits is 2592, while the sum is 23.

The square root of 331243043 is about 18200.0835987091. The cubic root of 331243043 is about 691.9089078699.

Adding to 331243043 its reverse (340342133), we get a palindrome (671585176).

The spelling of 331243043 in words is "three hundred thirty-one million, two hundred forty-three thousand, forty-three".