243123513042 has 16 divisors (see below), whose sum is σ = 487202330880. Its totient is φ = 80881953552.

The previous prime is 243123513007. The next prime is 243123513043. The reversal of 243123513042 is 240315321342.

243123513042 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (243123513043) 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 7 ways as a sum of consecutive naturals, for example, 39801058 + ... + 39807165.

It is an arithmetic number, because the mean of its divisors is an integer number (30450145680).

Almost surely, 2^243123513042 is an apocalyptic number.

243123513042 is an abundant number, since it is smaller than the sum of its proper divisors (244078817838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243123513042 is a wasteful number, since it uses less digits than its factorization.

243123513042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79608737.

The product of its (nonzero) digits is 17280, while the sum is 30.

Adding to 243123513042 its reverse (240315321342), we get a palindrome (483438834384).

The spelling of 243123513042 in words is "two hundred forty-three billion, one hundred twenty-three million, five hundred thirteen thousand, forty-two".