243205231423 has 32 divisors (see below), whose sum is σ = 304720704000. Its totient is φ = 188572475520.

The previous prime is 243205231397. The next prime is 243205231463. The reversal of 243205231423 is 324132502342.

It is not a de Polignac number, because 243205231423 - 2¹³ = 243205223231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243205231463) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17785633 + ... + 17799301.

It is an arithmetic number, because the mean of its divisors is an integer number (9522522000).

Almost surely, 2^243205231423 is an apocalyptic number.

243205231423 is a deficient number, since it is larger than the sum of its proper divisors (61515472577).

243205231423 is a wasteful number, since it uses less digits than its factorization.

243205231423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14815.

The product of its (nonzero) digits is 34560, while the sum is 31.

Adding to 243205231423 its reverse (324132502342), we get a palindrome (567337733765).

The spelling of 243205231423 in words is "two hundred forty-three billion, two hundred five million, two hundred thirty-one thousand, four hundred twenty-three".