243545034344201 has 2 divisors, whose sum is σ = 243545034344202. Its totient is φ = 243545034344200.

The previous prime is 243545034344191. The next prime is 243545034344233. The reversal of 243545034344201 is 102443430545342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 241030593025600 + 2514441318601 = 15525160^2 + 1585699^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243545034344201 is a prime.

It is a super-3 number, since 3×243545034344201³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (243545034344281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121772517172100 + 121772517172101.

It is an arithmetic number, because the mean of its divisors is an integer number (121772517172101).

Almost surely, 2^{243545034344201} is an apocalyptic number.

It is an amenable number.

243545034344201 is a deficient number, since it is larger than the sum of its proper divisors (1).

243545034344201 is an equidigital number, since it uses as much as digits as its factorization.

243545034344201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2764800, while the sum is 44.

Adding to 243545034344201 its reverse (102443430545342), we get a palindrome (345988464889543).

The spelling of 243545034344201 in words is "two hundred forty-three trillion, five hundred forty-five billion, thirty-four million, three hundred forty-four thousand, two hundred one".