243727144631 has 2 divisors, whose sum is σ = 243727144632. Its totient is φ = 243727144630.

The previous prime is 243727144561. The next prime is 243727144643. The reversal of 243727144631 is 136441727342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243727144631 - 2¹⁰ = 243727143607 is a prime.

It is a super-2 number, since 2×243727144631² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243727144681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121863572315 + 121863572316.

It is an arithmetic number, because the mean of its divisors is an integer number (121863572316).

Almost surely, 2^243727144631 is an apocalyptic number.

243727144631 is a deficient number, since it is larger than the sum of its proper divisors (1).

243727144631 is an equidigital number, since it uses as much as digits as its factorization.

243727144631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 677376, while the sum is 44.

The spelling of 243727144631 in words is "two hundred forty-three billion, seven hundred twenty-seven million, one hundred forty-four thousand, six hundred thirty-one".