243034245281 has 2 divisors, whose sum is σ = 243034245282. Its totient is φ = 243034245280.

The previous prime is 243034245187. The next prime is 243034245341. The reversal of 243034245281 is 182542430342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 242079744256 + 954501025 = 492016^2 + 30895^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243034245281 is a prime.

It is a super-2 number, since 2×243034245281² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (243034445281) 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, 121517122640 + 121517122641.

It is an arithmetic number, because the mean of its divisors is an integer number (121517122641).

Almost surely, 2^243034245281 is an apocalyptic number.

It is an amenable number.

243034245281 is a deficient number, since it is larger than the sum of its proper divisors (1).

243034245281 is an equidigital number, since it uses as much as digits as its factorization.

243034245281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 184320, while the sum is 38.

The spelling of 243034245281 in words is "two hundred forty-three billion, thirty-four million, two hundred forty-five thousand, two hundred eighty-one".