243102112155 has 72 divisors (see below), whose sum is σ = 500602669632. Its totient is φ = 108767828736.

The previous prime is 243102112151. The next prime is 243102112157. The reversal of 243102112155 is 551211201342.

It is a happy number.

243102112155 is a `hidden beast` number, since 2 + 431 + 0 + 2 + 11 + 215 + 5 = 666.

243102112155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 243102112155 - 2² = 243102112151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243102112151) 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 71 ways as a sum of consecutive naturals, for example, 1069242 + ... + 1276511.

It is an arithmetic number, because the mean of its divisors is an integer number (6952814856).

Almost surely, 2^243102112155 is an apocalyptic number.

243102112155 is an abundant number, since it is smaller than the sum of its proper divisors (257500557477).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243102112155 is a wasteful number, since it uses less digits than its factorization.

243102112155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2345825 (or 2345815 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

Adding to 243102112155 its reverse (551211201342), we get a palindrome (794313313497).

The spelling of 243102112155 in words is "two hundred forty-three billion, one hundred two million, one hundred twelve thousand, one hundred fifty-five".