243143231 has 8 divisors (see below), whose sum is σ = 259088400. Its totient is φ = 227380608.

The previous prime is 243143227. The next prime is 243143233. The reversal of 243143231 is 132341342.

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

It is a cyclic number.

It is not a de Polignac number, because 243143231 - 2² = 243143227 is a prime.

It is a super-2 number, since 2×243143231² = 118237261562238722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243143197 and 243143206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243143233) 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 7 ways as a sum of consecutive naturals, for example, 42881 + ... + 48218.

It is an arithmetic number, because the mean of its divisors is an integer number (32386050).

Almost surely, 2^243143231 is an apocalyptic number.

243143231 is a deficient number, since it is larger than the sum of its proper divisors (15945169).

243143231 is a wasteful number, since it uses less digits than its factorization.

243143231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91273.

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

The square root of 243143231 is about 15593.0507278082. The cubic root of 243143231 is about 624.1477287957.

Adding to 243143231 its reverse (132341342), we get a palindrome (375484573).

The spelling of 243143231 in words is "two hundred forty-three million, one hundred forty-three thousand, two hundred thirty-one".