243433203253 has 2 divisors, whose sum is σ = 243433203254. Its totient is φ = 243433203252.

The previous prime is 243433203229. The next prime is 243433203257. The reversal of 243433203253 is 352302334342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 158972056369 + 84461146884 = 398713^2 + 290622^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243433203253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243433203257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121716601626 + 121716601627.

It is an arithmetic number, because the mean of its divisors is an integer number (121716601627).

Almost surely, 2^243433203253 is an apocalyptic number.

It is an amenable number.

243433203253 is a deficient number, since it is larger than the sum of its proper divisors (1).

243433203253 is an equidigital number, since it uses as much as digits as its factorization.

243433203253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 34.

Adding to 243433203253 its reverse (352302334342), we get a palindrome (595735537595).

The spelling of 243433203253 in words is "two hundred forty-three billion, four hundred thirty-three million, two hundred three thousand, two hundred fifty-three".