231344143 has 8 divisors (see below), whose sum is σ = 255603168. Its totient is φ = 208268544.

The previous prime is 231344137. The next prime is 231344149. The reversal of 231344143 is 341443132.

It is an interprime number because it is at equal distance from previous prime (231344137) and next prime (231344149).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231344143 is a prime.

It is a super-2 number, since 2×231344143² = 107040225000808898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231344149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 295446 + ... + 296227.

It is an arithmetic number, because the mean of its divisors is an integer number (31950396).

Almost surely, 2^231344143 is an apocalyptic number.

231344143 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

231344143 is a deficient number, since it is larger than the sum of its proper divisors (24259025).

231344143 is a wasteful number, since it uses less digits than its factorization.

231344143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591713.

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

The square root of 231344143 is about 15210.0014135437. The cubic root of 231344143 is about 613.8837955205.

Adding to 231344143 its reverse (341443132), we get a palindrome (572787275).

The spelling of 231344143 in words is "two hundred thirty-one million, three hundred forty-four thousand, one hundred forty-three".