243040233 has 4 divisors (see below), whose sum is σ = 324053648. Its totient is φ = 162026820.

The previous prime is 243040201. The next prime is 243040247. The reversal of 243040233 is 332040342.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 243040233 - 2⁵ = 243040201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (243045233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40506703 + ... + 40506708.

It is an arithmetic number, because the mean of its divisors is an integer number (81013412).

Almost surely, 2^243040233 is an apocalyptic number.

It is an amenable number.

243040233 is a deficient number, since it is larger than the sum of its proper divisors (81013415).

243040233 is an equidigital number, since it uses as much as digits as its factorization.

243040233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81013414.

The product of its (nonzero) digits is 1728, while the sum is 21.

The square root of 243040233 is about 15589.7476887857. The cubic root of 243040233 is about 624.0595845264.

Adding to 243040233 its reverse (332040342), we get a palindrome (575080575).

The spelling of 243040233 in words is "two hundred forty-three million, forty thousand, two hundred thirty-three".