243155011321 has 16 divisors (see below), whose sum is σ = 246046694400. Its totient is φ = 240285759120.

The previous prime is 243155011261. The next prime is 243155011339. The reversal of 243155011321 is 123110551342.

It is a cyclic number.

It is not a de Polignac number, because 243155011321 - 2²³ = 243146622713 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243155011321.

It is not an unprimeable number, because it can be changed into a prime (243155015321) 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, 17507646 + ... + 17521528.

It is an arithmetic number, because the mean of its divisors is an integer number (15377918400).

Almost surely, 2^243155011321 is an apocalyptic number.

It is an amenable number.

243155011321 is a deficient number, since it is larger than the sum of its proper divisors (2891683079).

243155011321 is a wasteful number, since it uses less digits than its factorization.

243155011321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14676.

The product of its (nonzero) digits is 3600, while the sum is 28.

Adding to 243155011321 its reverse (123110551342), we get a palindrome (366265562663).

The spelling of 243155011321 in words is "two hundred forty-three billion, one hundred fifty-five million, eleven thousand, three hundred twenty-one".