243343135553 has 16 divisors (see below), whose sum is σ = 279911049600. Its totient is φ = 207228585600.

The previous prime is 243343135549. The next prime is 243343135561. The reversal of 243343135553 is 355531343342.

It is a cyclic number.

It is not a de Polignac number, because 243343135553 - 2² = 243343135549 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 243343135553.

It is not an unprimeable number, because it can be changed into a prime (243343135523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1237538 + ... + 1420628.

It is an arithmetic number, because the mean of its divisors is an integer number (17494440600).

Almost surely, 2^243343135553 is an apocalyptic number.

It is an amenable number.

243343135553 is a deficient number, since it is larger than the sum of its proper divisors (36567914047).

243343135553 is a wasteful number, since it uses less digits than its factorization.

243343135553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184328.

The product of its digits is 972000, while the sum is 41.

Adding to 243343135553 its reverse (355531343342), we get a palindrome (598874478895).

The spelling of 243343135553 in words is "two hundred forty-three billion, three hundred forty-three million, one hundred thirty-five thousand, five hundred fifty-three".