243431243 has 4 divisors (see below), whose sum is σ = 265561368. Its totient is φ = 221301120.

The previous prime is 243431233. The next prime is 243431291. The reversal of 243431243 is 342134342.

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 243431243 - 2⁶ = 243431179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243431233) 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, 11065046 + ... + 11065067.

It is an arithmetic number, because the mean of its divisors is an integer number (66390342).

Almost surely, 2^243431243 is an apocalyptic number.

243431243 is a deficient number, since it is larger than the sum of its proper divisors (22130125).

243431243 is a wasteful number, since it uses less digits than its factorization.

243431243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22130124.

The product of its digits is 6912, while the sum is 26.

The square root of 243431243 is about 15602.2832623946. The cubic root of 243431243 is about 624.3940734480.

Adding to 243431243 its reverse (342134342), we get a palindrome (585565585).

The spelling of 243431243 in words is "two hundred forty-three million, four hundred thirty-one thousand, two hundred forty-three".