242231664578 has 6 divisors (see below), whose sum is σ = 363348540921. Its totient is φ = 121115484272.

The previous prime is 242231664533. The next prime is 242231664679. The reversal of 242231664578 is 875466132242.

242231664578 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 235363730449 + 6867934129 = 485143^2 + 82873^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=348017.

It is a Duffinian number.

It is a Curzon 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 2 ways as a sum of consecutive naturals, for example, 522026 + ... + 870042.

Almost surely, 2^242231664578 is an apocalyptic number.

242231664578 is a deficient number, since it is larger than the sum of its proper divisors (121116876343).

242231664578 is an frugal number, since it uses more digits than its factorization.

242231664578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696036 (or 348019 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 50.

Multiplying 242231664578 by its sum of digits (50), we get a square (12111583228900 = 3480170²).

It can be divided in two parts, 242231664 and 578, that added together give a palindrome (242232242).

The spelling of 242231664578 in words is "two hundred forty-two billion, two hundred thirty-one million, six hundred sixty-four thousand, five hundred seventy-eight".