243031323 has 4 divisors (see below), whose sum is σ = 324041768. Its totient is φ = 162020880.

The previous prime is 243031319. The next prime is 243031357. The reversal of 243031323 is 323130342.

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

It is not a de Polignac number, because 243031323 - 2² = 243031319 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 243031323.

It is not an unprimeable number, because it can be changed into a prime (243031423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40505218 + ... + 40505223.

It is an arithmetic number, because the mean of its divisors is an integer number (81010442).

Almost surely, 2^243031323 is an apocalyptic number.

243031323 is a deficient number, since it is larger than the sum of its proper divisors (81010445).

243031323 is an equidigital number, since it uses as much as digits as its factorization.

243031323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81010444.

The product of its (nonzero) digits is 1296, while the sum is 21.

The square root of 243031323 is about 15589.4619214391. The cubic root of 243031323 is about 624.0519583009.

Adding to 243031323 its reverse (323130342), we get a palindrome (566161665).

The spelling of 243031323 in words is "two hundred forty-three million, thirty-one thousand, three hundred twenty-three".