231432143 has 12 divisors (see below), whose sum is σ = 241270848. Its totient is φ = 221759520.

The previous prime is 231432139. The next prime is 231432163. The reversal of 231432143 is 341234132.

It is not a de Polignac number, because 231432143 - 2² = 231432139 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 (231432163) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 993155 + ... + 993387.

It is an arithmetic number, because the mean of its divisors is an integer number (20105904).

Almost surely, 2^231432143 is an apocalyptic number.

231432143 is a deficient number, since it is larger than the sum of its proper divisors (9838705).

231432143 is an equidigital number, since it uses as much as digits as its factorization.

231432143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622 (or 443 counting only the distinct ones).

The product of its digits is 1728, while the sum is 23.

The square root of 231432143 is about 15212.8939718911. The cubic root of 231432143 is about 613.9616231889.

Adding to 231432143 its reverse (341234132), we get a palindrome (572666275).

The spelling of 231432143 in words is "two hundred thirty-one million, four hundred thirty-two thousand, one hundred forty-three".