243241055503123 has 4 divisors (see below), whose sum is σ = 243472934489400. Its totient is φ = 243009176516848.

The previous prime is 243241055503081. The next prime is 243241055503141. The reversal of 243241055503123 is 321305550142342.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243241055503123 is a prime.

It is a super-2 number, since 2×243241055503123² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243241055507123) 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, 115939491565 + ... + 115939493662.

It is an arithmetic number, because the mean of its divisors is an integer number (60868233622350).

Almost surely, 2^{243241055503123} is an apocalyptic number.

243241055503123 is a deficient number, since it is larger than the sum of its proper divisors (231878986277).

243241055503123 is a wasteful number, since it uses less digits than its factorization.

243241055503123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231878986276.

The product of its (nonzero) digits is 432000, while the sum is 40.

The spelling of 243241055503123 in words is "two hundred forty-three trillion, two hundred forty-one billion, fifty-five million, five hundred three thousand, one hundred twenty-three".