243213533246357 has 2 divisors, whose sum is σ = 243213533246358. Its totient is φ = 243213533246356.

The previous prime is 243213533246303. The next prime is 243213533246363. The reversal of 243213533246357 is 753642335312342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 154753376080081 + 88460157166276 = 12439991^2 + 9405326^2 .

It is a cyclic number.

It is not a de Polignac number, because 243213533246357 - 2³⁰ = 243212459504533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 243213533246299 and 243213533246308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243213533243357) 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, 121606766623178 + 121606766623179.

It is an arithmetic number, because the mean of its divisors is an integer number (121606766623179).

Almost surely, 2^{243213533246357} is an apocalyptic number.

It is an amenable number.

243213533246357 is a deficient number, since it is larger than the sum of its proper divisors (1).

243213533246357 is an equidigital number, since it uses as much as digits as its factorization.

243213533246357 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32659200, while the sum is 53.

Adding to 243213533246357 its reverse (753642335312342), we get a palindrome (996855868558699).

The spelling of 243213533246357 in words is "two hundred forty-three trillion, two hundred thirteen billion, five hundred thirty-three million, two hundred forty-six thousand, three hundred fifty-seven".