243113321 has 12 divisors (see below), whose sum is σ = 267649200. Its totient is φ = 220660440.

The previous prime is 243113291. The next prime is 243113327. The reversal of 243113321 is 123311342.

It is not a de Polignac number, because 243113321 - 2¹⁰ = 243112297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243113293 and 243113302.

It is not an unprimeable number, because it can be changed into a prime (243113327) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102770 + ... + 105108.

It is an arithmetic number, because the mean of its divisors is an integer number (22304100).

Almost surely, 2^243113321 is an apocalyptic number.

It is an amenable number.

243113321 is a deficient number, since it is larger than the sum of its proper divisors (24535879).

243113321 is a wasteful number, since it uses less digits than its factorization.

243113321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3220 (or 3209 counting only the distinct ones).

The product of its digits is 432, while the sum is 20.

The square root of 243113321 is about 15592.0916172270. The cubic root of 243113321 is about 624.1221347949.

Adding to 243113321 its reverse (123311342), we get a palindrome (366424663).

The spelling of 243113321 in words is "two hundred forty-three million, one hundred thirteen thousand, three hundred twenty-one".