331142143 has 4 divisors (see below), whose sum is σ = 332337880. Its totient is φ = 329946408.

The previous prime is 331142137. The next prime is 331142159. The reversal of 331142143 is 341241133.

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 331142143 - 2⁹ = 331141631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331142113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 597453 + ... + 598006.

It is an arithmetic number, because the mean of its divisors is an integer number (83084470).

Almost surely, 2^331142143 is an apocalyptic number.

331142143 is a deficient number, since it is larger than the sum of its proper divisors (1195737).

331142143 is a wasteful number, since it uses less digits than its factorization.

331142143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1195736.

The product of its digits is 864, while the sum is 22.

The square root of 331142143 is about 18197.3114222953. The cubic root of 331142143 is about 691.8386465717.

Adding to 331142143 its reverse (341241133), we get a palindrome (672383276).

It can be divided in two parts, 3311 and 42143, that added together give a palindrome (45454).

The spelling of 331142143 in words is "three hundred thirty-one million, one hundred forty-two thousand, one hundred forty-three".