243043040031 has 64 divisors (see below), whose sum is σ = 389048832000. Its totient is φ = 133474825440.

The previous prime is 243043040027. The next prime is 243043040057. The reversal of 243043040031 is 130040340342.

It is not a de Polignac number, because 243043040031 - 2² = 243043040027 is a prime.

It is a super-2 number, since 2×243043040031² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243043039983 and 243043040010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243043040231) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7612780 + ... + 7644638.

It is an arithmetic number, because the mean of its divisors is an integer number (6078888000).

Almost surely, 2^243043040031 is an apocalyptic number.

243043040031 is a deficient number, since it is larger than the sum of its proper divisors (146005791969).

243043040031 is a wasteful number, since it uses less digits than its factorization.

243043040031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31961 (or 31915 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 243043040031 its reverse (130040340342), we get a palindrome (373083380373).

The spelling of 243043040031 in words is "two hundred forty-three billion, forty-three million, forty thousand, thirty-one".