243115155135 has 64 divisors (see below), whose sum is σ = 438995727360. Its totient is φ = 127627125120.

The previous prime is 243115155011. The next prime is 243115155163. The reversal of 243115155135 is 531551511342.

243115155135 is a `hidden beast` number, since 2 + 4 + 3 + 1 + 1 + 515 + 5 + 135 = 666.

It is not a de Polignac number, because 243115155135 - 2¹⁰ = 243115154111 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243115155135.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12481414 + ... + 12500876.

It is an arithmetic number, because the mean of its divisors is an integer number (6859308240).

Almost surely, 2^243115155135 is an apocalyptic number.

243115155135 is a deficient number, since it is larger than the sum of its proper divisors (195880572225).

243115155135 is a wasteful number, since it uses less digits than its factorization.

243115155135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20925 (or 20919 counting only the distinct ones).

The product of its digits is 45000, while the sum is 36.

Adding to 243115155135 its reverse (531551511342), we get a palindrome (774666666477).

The spelling of 243115155135 in words is "two hundred forty-three billion, one hundred fifteen million, one hundred fifty-five thousand, one hundred thirty-five".