243155213055 has 48 divisors (see below), whose sum is σ = 451680166080. Its totient is φ = 120691828224.

The previous prime is 243155213033. The next prime is 243155213087. The reversal of 243155213055 is 550312551342.

243155213055 is a `hidden beast` number, since 2 + 43 + 1 + 552 + 13 + 0 + 55 = 666.

It is not a de Polignac number, because 243155213055 - 2¹⁵ = 243155180287 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3136470 + ... + 3213059.

It is an arithmetic number, because the mean of its divisors is an integer number (9410003460).

Almost surely, 2^243155213055 is an apocalyptic number.

243155213055 is a deficient number, since it is larger than the sum of its proper divisors (208524953025).

243155213055 is a wasteful number, since it uses less digits than its factorization.

243155213055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6349600 (or 6349597 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

Adding to 243155213055 its reverse (550312551342), we get a palindrome (793467764397).

The spelling of 243155213055 in words is "two hundred forty-three billion, one hundred fifty-five million, two hundred thirteen thousand, fifty-five".