243120717233 has 2 divisors, whose sum is σ = 243120717234. Its totient is φ = 243120717232.

The previous prime is 243120717221. The next prime is 243120717251. The reversal of 243120717233 is 332717021342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 165174777889 + 77945939344 = 406417^2 + 279188^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243120717233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 243120717193 and 243120717202.

It is not a weakly prime, because it can be changed into another prime (243120717263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121560358616 + 121560358617.

It is an arithmetic number, because the mean of its divisors is an integer number (121560358617).

Almost surely, 2^243120717233 is an apocalyptic number.

It is an amenable number.

243120717233 is a deficient number, since it is larger than the sum of its proper divisors (1).

243120717233 is an equidigital number, since it uses as much as digits as its factorization.

243120717233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336, while the sum is 35.

Adding to 243120717233 its reverse (332717021342), we get a palindrome (575837738575).

The spelling of 243120717233 in words is "two hundred forty-three billion, one hundred twenty million, seven hundred seventeen thousand, two hundred thirty-three".