243143534555 has 4 divisors (see below), whose sum is σ = 291772241472. Its totient is φ = 194514827640.

The previous prime is 243143534549. The next prime is 243143534611. The reversal of 243143534555 is 555435341342.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 243143534555 - 2¹⁴ = 243143518171 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24314353451 + ... + 24314353460.

It is an arithmetic number, because the mean of its divisors is an integer number (72943060368).

Almost surely, 2^243143534555 is an apocalyptic number.

243143534555 is a deficient number, since it is larger than the sum of its proper divisors (48628706917).

243143534555 is an equidigital number, since it uses as much as digits as its factorization.

243143534555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48628706916.

The product of its digits is 2160000, while the sum is 44.

Adding to 243143534555 its reverse (555435341342), we get a palindrome (798578875897).

The spelling of 243143534555 in words is "two hundred forty-three billion, one hundred forty-three million, five hundred thirty-four thousand, five hundred fifty-five".