243440133 has 8 divisors (see below), whose sum is σ = 324712608. Its totient is φ = 162230544.

The previous prime is 243440111. The next prime is 243440137. The reversal of 243440133 is 331044342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 243440133 - 2⁵ = 243440101 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243440137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5791 + ... + 22812.

It is an arithmetic number, because the mean of its divisors is an integer number (40589076).

Almost surely, 2^243440133 is an apocalyptic number.

It is an amenable number.

243440133 is a deficient number, since it is larger than the sum of its proper divisors (81272475).

243440133 is a wasteful number, since it uses less digits than its factorization.

243440133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31443.

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 243440133 is about 15602.5681539931. The cubic root of 243440133 is about 624.4016742195.

Adding to 243440133 its reverse (331044342), we get a palindrome (574484475).

The spelling of 243440133 in words is "two hundred forty-three million, four hundred forty thousand, one hundred thirty-three".