243331204231 has 4 divisors (see below), whose sum is σ = 243333591592. Its totient is φ = 243328816872.

The previous prime is 243331204213. The next prime is 243331204243. The reversal of 243331204231 is 132402133342.

It is a happy number.

243331204231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 243331204231 - 2²³ = 243322815623 is a prime.

It is a super-2 number, since 2×243331204231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243331204231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243331204201) 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, 1033641 + ... + 1247026.

It is an arithmetic number, because the mean of its divisors is an integer number (60833397898).

Almost surely, 2^243331204231 is an apocalyptic number.

243331204231 is a deficient number, since it is larger than the sum of its proper divisors (2387361).

243331204231 is a wasteful number, since it uses less digits than its factorization.

243331204231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2387360.

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 243331204231 its reverse (132402133342), we get a palindrome (375733337573).

The spelling of 243331204231 in words is "two hundred forty-three billion, three hundred thirty-one million, two hundred four thousand, two hundred thirty-one".