242153042555 has 4 divisors (see below), whose sum is σ = 290583651072. Its totient is φ = 193722434040.

The previous prime is 242153042503. The next prime is 242153042603. The reversal of 242153042555 is 555240351242.

242153042555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 242153042555 - 2²⁸ = 241884607099 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 24215304251 + ... + 24215304260.

It is an arithmetic number, because the mean of its divisors is an integer number (72645912768).

Almost surely, 2^242153042555 is an apocalyptic number.

242153042555 is a deficient number, since it is larger than the sum of its proper divisors (48430608517).

242153042555 is an equidigital number, since it uses as much as digits as its factorization.

242153042555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48430608516.

The product of its (nonzero) digits is 240000, while the sum is 38.

Adding to 242153042555 its reverse (555240351242), we get a palindrome (797393393797).

The spelling of 242153042555 in words is "two hundred forty-two billion, one hundred fifty-three million, forty-two thousand, five hundred fifty-five".