243131524061 has 2 divisors, whose sum is σ = 243131524062. Its totient is φ = 243131524060.

The previous prime is 243131524049. The next prime is 243131524087. The reversal of 243131524061 is 160425131342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 219693751225 + 23437772836 = 468715^2 + 153094^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243131524061 is a prime.

It is a super-2 number, since 2×243131524061² (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 (243131529061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121565762030 + 121565762031.

It is an arithmetic number, because the mean of its divisors is an integer number (121565762031).

Almost surely, 2^243131524061 is an apocalyptic number.

It is an amenable number.

243131524061 is a deficient number, since it is larger than the sum of its proper divisors (1).

243131524061 is an equidigital number, since it uses as much as digits as its factorization.

243131524061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 32.

The spelling of 243131524061 in words is "two hundred forty-three billion, one hundred thirty-one million, five hundred twenty-four thousand, sixty-one".