243324540257 has 2 divisors, whose sum is σ = 243324540258. Its totient is φ = 243324540256.

The previous prime is 243324540197. The next prime is 243324540317. The reversal of 243324540257 is 752045423342.

243324540257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (243324540197) and next prime (243324540317).

It can be written as a sum of positive squares in only one way, i.e., 242107297936 + 1217242321 = 492044^2 + 34889^2 .

It is a cyclic number.

It is not a de Polignac number, because 243324540257 - 2¹⁰ = 243324539233 is a prime.

It is not a weakly prime, because it can be changed into another prime (243324540457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121662270128 + 121662270129.

It is an arithmetic number, because the mean of its divisors is an integer number (121662270129).

Almost surely, 2^243324540257 is an apocalyptic number.

It is an amenable number.

243324540257 is a deficient number, since it is larger than the sum of its proper divisors (1).

243324540257 is an equidigital number, since it uses as much as digits as its factorization.

243324540257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 806400, while the sum is 41.

Adding to 243324540257 its reverse (752045423342), we get a palindrome (995369963599).

The spelling of 243324540257 in words is "two hundred forty-three billion, three hundred twenty-four million, five hundred forty thousand, two hundred fifty-seven".