231443143 has 4 divisors (see below), whose sum is σ = 232064008. Its totient is φ = 230822280.

The previous prime is 231443141. The next prime is 231443153. The reversal of 231443143 is 341344132.

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 231443143 - 2¹ = 231443141 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 (231443141) 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, 309873 + ... + 310618.

It is an arithmetic number, because the mean of its divisors is an integer number (58016002).

Almost surely, 2^231443143 is an apocalyptic number.

231443143 is a deficient number, since it is larger than the sum of its proper divisors (620865).

231443143 is an equidigital number, since it uses as much as digits as its factorization.

231443143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620864.

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

The square root of 231443143 is about 15213.2555030145. The cubic root of 231443143 is about 613.9713502602.

Adding to 231443143 its reverse (341344132), we get a palindrome (572787275).

The spelling of 231443143 in words is "two hundred thirty-one million, four hundred forty-three thousand, one hundred forty-three".