243323111 has 4 divisors (see below), whose sum is σ = 248981832. Its totient is φ = 237664392.

The previous prime is 243323077. The next prime is 243323131. The reversal of 243323111 is 111323342.

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

It is a cyclic number.

It is not a de Polignac number, because 243323111 - 2¹⁰ = 243322087 is a prime.

It is a super-2 number, since 2×243323111² = 118412272693436642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243323131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2829296 + ... + 2829381.

It is an arithmetic number, because the mean of its divisors is an integer number (62245458).

Almost surely, 2^243323111 is an apocalyptic number.

243323111 is a deficient number, since it is larger than the sum of its proper divisors (5658721).

243323111 is an equidigital number, since it uses as much as digits as its factorization.

243323111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5658720.

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

The square root of 243323111 is about 15598.8176154477. The cubic root of 243323111 is about 624.3016079417.

Adding to 243323111 its reverse (111323342), we get a palindrome (354646453).

The spelling of 243323111 in words is "two hundred forty-three million, three hundred twenty-three thousand, one hundred eleven".