243231561105 has 16 divisors (see below), whose sum is σ = 419106690240. Its totient is φ = 119744768448.

The previous prime is 243231561077. The next prime is 243231561107. The reversal of 243231561105 is 501165132342.

It is not a de Polignac number, because 243231561105 - 2⁵ = 243231561073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243231561107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 623670475 + ... + 623670864.

It is an arithmetic number, because the mean of its divisors is an integer number (26194168140).

Almost surely, 2^243231561105 is an apocalyptic number.

It is an amenable number.

243231561105 is a deficient number, since it is larger than the sum of its proper divisors (175875129135).

243231561105 is a wasteful number, since it uses less digits than its factorization.

243231561105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1247341360.

The product of its (nonzero) digits is 21600, while the sum is 33.

Adding to 243231561105 its reverse (501165132342), we get a palindrome (744396693447).

The spelling of 243231561105 in words is "two hundred forty-three billion, two hundred thirty-one million, five hundred sixty-one thousand, one hundred five".