243244231 has 4 divisors (see below), whose sum is σ = 243290392. Its totient is φ = 243198072.

The previous prime is 243244219. The next prime is 243244247. The reversal of 243244231 is 132442342.

It is a happy number.

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 243244231 - 2¹¹ = 243242183 is a prime.

It is a super-2 number, since 2×243244231² = 118335511829562722, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 243244196 and 243244205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243244831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13980 + ... + 26113.

It is an arithmetic number, because the mean of its divisors is an integer number (60822598).

Almost surely, 2^243244231 is an apocalyptic number.

243244231 is a deficient number, since it is larger than the sum of its proper divisors (46161).

243244231 is an equidigital number, since it uses as much as digits as its factorization.

243244231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46160.

The product of its digits is 4608, while the sum is 25.

The square root of 243244231 is about 15596.2890137366. The cubic root of 243244231 is about 624.2341390345.

Adding to 243244231 its reverse (132442342), we get a palindrome (375686573).

The spelling of 243244231 in words is "two hundred forty-three million, two hundred forty-four thousand, two hundred thirty-one".