243134211105 has 24 divisors (see below), whose sum is σ = 421583847360. Its totient is φ = 129625051680.

The previous prime is 243134211091. The next prime is 243134211109. The reversal of 243134211105 is 501112431342.

243134211105 is a `hidden beast` number, since 2 + 431 + 3 + 4 + 211 + 10 + 5 = 666.

243134211105 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-243134211105 is a prime.

It is a super-2 number, since 2×243134211105² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (243134211109) 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 23 ways as a sum of consecutive naturals, for example, 842335 + ... + 1093524.

It is an arithmetic number, because the mean of its divisors is an integer number (17565993640).

Almost surely, 2^243134211105 is an apocalyptic number.

It is an amenable number.

243134211105 is a deficient number, since it is larger than the sum of its proper divisors (178449636255).

243134211105 is a wasteful number, since it uses less digits than its factorization.

243134211105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1938661 (or 1938658 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

Adding to 243134211105 its reverse (501112431342), we get a palindrome (744246642447).

The spelling of 243134211105 in words is "two hundred forty-three billion, one hundred thirty-four million, two hundred eleven thousand, one hundred five".