243124031231 has 4 divisors (see below), whose sum is σ = 249694951032. Its totient is φ = 236553111432.

The previous prime is 243124031221. The next prime is 243124031239. The reversal of 243124031231 is 132130421342.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 243124031231 - 2³⁴ = 225944162047 is a prime.

It is a super-2 number, since 2×243124031231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243124031231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243124031239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3285459845 + ... + 3285459918.

It is an arithmetic number, because the mean of its divisors is an integer number (62423737758).

Almost surely, 2^243124031231 is an apocalyptic number.

243124031231 is a deficient number, since it is larger than the sum of its proper divisors (6570919801).

243124031231 is an equidigital number, since it uses as much as digits as its factorization.

243124031231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6570919800.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 243124031231 its reverse (132130421342), we get a palindrome (375254452573).

The spelling of 243124031231 in words is "two hundred forty-three billion, one hundred twenty-four million, thirty-one thousand, two hundred thirty-one".