243203250449 has 8 divisors (see below), whose sum is σ = 251807808360. Its totient is φ = 234613241856.

The previous prime is 243203250443. The next prime is 243203250461. The reversal of 243203250449 is 944052302342.

It can be written as a sum of positive squares in 4 ways, for example, as 130479888400 + 112723362049 = 361220^2 + 335743^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 243203250449 - 2²⁰ = 243202201873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243203250443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3603302 + ... + 3670175.

It is an arithmetic number, because the mean of its divisors is an integer number (31475976045).

Almost surely, 2^243203250449 is an apocalyptic number.

243203250449 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

243203250449 is a deficient number, since it is larger than the sum of its proper divisors (8604557911).

243203250449 is a wasteful number, since it uses less digits than its factorization.

243203250449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7274659.

The product of its (nonzero) digits is 207360, while the sum is 38.

The spelling of 243203250449 in words is "two hundred forty-three billion, two hundred three million, two hundred fifty thousand, four hundred forty-nine".