231242143 has 16 divisors (see below), whose sum is σ = 276320160. Its totient is φ = 191027200.

The previous prime is 231242131. The next prime is 231242149. The reversal of 231242143 is 341242132.

It is a cyclic number.

It is not a de Polignac number, because 231242143 - 2⁵ = 231242111 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 (231242149) 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 15 ways as a sum of consecutive naturals, for example, 15898 + ... + 26743.

It is an arithmetic number, because the mean of its divisors is an integer number (17270010).

Almost surely, 2^231242143 is an apocalyptic number.

231242143 is a deficient number, since it is larger than the sum of its proper divisors (45078017).

231242143 is a wasteful number, since it uses less digits than its factorization.

231242143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42698.

The product of its digits is 1152, while the sum is 22.

The square root of 231242143 is about 15206.6479869825. The cubic root of 231242143 is about 613.7935614777.

Adding to 231242143 its reverse (341242132), we get a palindrome (572484275).

The spelling of 231242143 in words is "two hundred thirty-one million, two hundred forty-two thousand, one hundred forty-three".