231568143 has 12 divisors (see below), whose sum is σ = 325864728. Its totient is φ = 146252880.

The previous prime is 231568087. The next prime is 231568151. The reversal of 231568143 is 341865132.

It is not a de Polignac number, because 231568143 - 2⁶ = 231568079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231568153) 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 11 ways as a sum of consecutive naturals, for example, 105828 + ... + 107993.

It is an arithmetic number, because the mean of its divisors is an integer number (27155394).

Almost surely, 2^231568143 is an apocalyptic number.

231568143 is a deficient number, since it is larger than the sum of its proper divisors (94296585).

231568143 is a wasteful number, since it uses less digits than its factorization.

231568143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213862 (or 213843 counting only the distinct ones).

The product of its digits is 17280, while the sum is 33.

The square root of 231568143 is about 15217.3632078623. The cubic root of 231568143 is about 614.0818635167.

The spelling of 231568143 in words is "two hundred thirty-one million, five hundred sixty-eight thousand, one hundred forty-three".