243375535121 has 4 divisors (see below), whose sum is σ = 243471016500. Its totient is φ = 243280053744.

The previous prime is 243375535111. The next prime is 243375535141. The reversal of 243375535121 is 121535573342.

243375535121 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 can be written as a sum of positive squares in 2 ways, for example, as 114964396096 + 128411139025 = 339064^2 + 358345^2 .

It is a cyclic number.

It is not a de Polignac number, because 243375535121 - 2⁶ = 243375535057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243375535111) 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 3 ways as a sum of consecutive naturals, for example, 47736866 + ... + 47741963.

It is an arithmetic number, because the mean of its divisors is an integer number (60867754125).

Almost surely, 2^243375535121 is an apocalyptic number.

It is an amenable number.

243375535121 is a deficient number, since it is larger than the sum of its proper divisors (95481379).

243375535121 is an equidigital number, since it uses as much as digits as its factorization.

243375535121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95481378.

The product of its digits is 378000, while the sum is 41.

The spelling of 243375535121 in words is "two hundred forty-three billion, three hundred seventy-five million, five hundred thirty-five thousand, one hundred twenty-one".