243123455223 has 48 divisors (see below), whose sum is σ = 409655649312. Its totient is φ = 137306880000.

The previous prime is 243123455219. The next prime is 243123455261. The reversal of 243123455223 is 322554321342.

243123455223 is a `hidden beast` number, since 2 + 4 + 3 + 123 + 4 + 5 + 522 + 3 = 666.

It is not a de Polignac number, because 243123455223 - 2² = 243123455219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243123455623) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 545158 + ... + 885123.

It is an arithmetic number, because the mean of its divisors is an integer number (8534492694).

Almost surely, 2^243123455223 is an apocalyptic number.

243123455223 is a deficient number, since it is larger than the sum of its proper divisors (166532194089).

243123455223 is a wasteful number, since it uses less digits than its factorization.

243123455223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1430416 (or 1430413 counting only the distinct ones).

The product of its digits is 172800, while the sum is 36.

Adding to 243123455223 its reverse (322554321342), we get a palindrome (565677776565).

The spelling of 243123455223 in words is "two hundred forty-three billion, one hundred twenty-three million, four hundred fifty-five thousand, two hundred twenty-three".