243140423731 has 2 divisors, whose sum is σ = 243140423732. Its totient is φ = 243140423730.

The previous prime is 243140423707. The next prime is 243140423741. The reversal of 243140423731 is 137324041342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243140423731 - 2³³ = 234550489139 is a prime.

It is a super-2 number, since 2×243140423731² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (243140423741) 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 as a sum of consecutive naturals, namely, 121570211865 + 121570211866.

It is an arithmetic number, because the mean of its divisors is an integer number (121570211866).

Almost surely, 2^243140423731 is an apocalyptic number.

243140423731 is a deficient number, since it is larger than the sum of its proper divisors (1).

243140423731 is an equidigital number, since it uses as much as digits as its factorization.

243140423731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 34.

The spelling of 243140423731 in words is "two hundred forty-three billion, one hundred forty million, four hundred twenty-three thousand, seven hundred thirty-one".