243055200311321 has 2 divisors, whose sum is σ = 243055200311322. Its totient is φ = 243055200311320.

The previous prime is 243055200311291. The next prime is 243055200311419. The reversal of 243055200311321 is 123113002550342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190145870056921 + 52909330254400 = 13789339^2 + 7273880^2 .

It is a cyclic number.

It is not a de Polignac number, because 243055200311321 - 2¹⁰ = 243055200310297 is a prime.

It is not a weakly prime, because it can be changed into another prime (243055200311921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121527600155660 + 121527600155661.

It is an arithmetic number, because the mean of its divisors is an integer number (121527600155661).

Almost surely, 2^{243055200311321} is an apocalyptic number.

It is an amenable number.

243055200311321 is a deficient number, since it is larger than the sum of its proper divisors (1).

243055200311321 is an equidigital number, since it uses as much as digits as its factorization.

243055200311321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 32.

Adding to 243055200311321 its reverse (123113002550342), we get a palindrome (366168202861663).

The spelling of 243055200311321 in words is "two hundred forty-three trillion, fifty-five billion, two hundred million, three hundred eleven thousand, three hundred twenty-one".