243315323 has 2 divisors, whose sum is σ = 243315324. Its totient is φ = 243315322.

The previous prime is 243315313. The next prime is 243315337. The reversal of 243315323 is 323513342.

It is a happy number.

243315323 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243315323 - 2¹⁸ = 243053179 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 243315292 and 243315301.

It is not a weakly prime, because it can be changed into another prime (243315313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121657661 + 121657662.

It is an arithmetic number, because the mean of its divisors is an integer number (121657662).

Almost surely, 2^243315323 is an apocalyptic number.

243315323 is a deficient number, since it is larger than the sum of its proper divisors (1).

243315323 is an equidigital number, since it uses as much as digits as its factorization.

243315323 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 26.

The square root of 243315323 is about 15598.5679791448. The cubic root of 243315323 is about 624.2949472334.

Adding to 243315323 its reverse (323513342), we get a palindrome (566828665).

The spelling of 243315323 in words is "two hundred forty-three million, three hundred fifteen thousand, three hundred twenty-three".