331142443 has 4 divisors (see below), whose sum is σ = 331255008. Its totient is φ = 331029880.

The previous prime is 331142429. The next prime is 331142459. The reversal of 331142443 is 344241133.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 344241133 = 137 ⋅2512709.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331142443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331142243) 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, 51748 + ... + 57793.

It is an arithmetic number, because the mean of its divisors is an integer number (82813752).

Almost surely, 2^331142443 is an apocalyptic number.

331142443 is a deficient number, since it is larger than the sum of its proper divisors (112565).

331142443 is a wasteful number, since it uses less digits than its factorization.

331142443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112564.

The product of its digits is 3456, while the sum is 25.

The square root of 331142443 is about 18197.3196652694. The cubic root of 331142443 is about 691.8388554966.

Adding to 331142443 its reverse (344241133), we get a palindrome (675383576).

It can be divided in two parts, 3311 and 42443, that added together give a palindrome (45754).

The spelling of 331142443 in words is "three hundred thirty-one million, one hundred forty-two thousand, four hundred forty-three".