243203355043 has 24 divisors (see below), whose sum is σ = 273504119616. Its totient is φ = 215998527360.

The previous prime is 243203354987. The next prime is 243203355047. The reversal of 243203355043 is 340553302342.

It is not a de Polignac number, because 243203355043 - 2¹⁷ = 243203223971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243203355047) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3129271 + ... + 3206047.

It is an arithmetic number, because the mean of its divisors is an integer number (11396004984).

Almost surely, 2^243203355043 is an apocalyptic number.

243203355043 is a deficient number, since it is larger than the sum of its proper divisors (30300764573).

243203355043 is a wasteful number, since it uses less digits than its factorization.

243203355043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77403 (or 77392 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 34.

Adding to 243203355043 its reverse (340553302342), we get a palindrome (583756657385).

The spelling of 243203355043 in words is "two hundred forty-three billion, two hundred three million, three hundred fifty-five thousand, forty-three".