243033040253 has 2 divisors, whose sum is σ = 243033040254. Its totient is φ = 243033040252.

The previous prime is 243033040093. The next prime is 243033040273. The reversal of 243033040253 is 352040330342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 157428813529 + 85604226724 = 396773^2 + 292582^2 .

It is a cyclic number.

It is not a de Polignac number, because 243033040253 - 2³² = 238738072957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243033040273) 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, 121516520126 + 121516520127.

It is an arithmetic number, because the mean of its divisors is an integer number (121516520127).

Almost surely, 2^243033040253 is an apocalyptic number.

It is an amenable number.

243033040253 is a deficient number, since it is larger than the sum of its proper divisors (1).

243033040253 is an equidigital number, since it uses as much as digits as its factorization.

243033040253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 29.

Adding to 243033040253 its reverse (352040330342), we get a palindrome (595073370595).

The spelling of 243033040253 in words is "two hundred forty-three billion, thirty-three million, forty thousand, two hundred fifty-three".