243142302123 has 16 divisors (see below), whose sum is σ = 411669506560. Its totient is φ = 138938458248.

The previous prime is 243142302089. The next prime is 243142302133. The reversal of 243142302123 is 321203241342.

243142302123 is a `hidden beast` number, since 24 + 3 + 1 + 423 + 0 + 212 + 3 = 666.

243142302123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 243142302123 - 2¹⁰ = 243142301099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243142302133) 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 15 ways as a sum of consecutive naturals, for example, 643233415 + ... + 643233792.

It is an arithmetic number, because the mean of its divisors is an integer number (25729344160).

Almost surely, 2^243142302123 is an apocalyptic number.

243142302123 is a deficient number, since it is larger than the sum of its proper divisors (168527204437).

243142302123 is a wasteful number, since it uses less digits than its factorization.

243142302123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286467223 (or 1286467217 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 243142302123 its reverse (321203241342), we get a palindrome (564345543465).

The spelling of 243142302123 in words is "two hundred forty-three billion, one hundred forty-two million, three hundred two thousand, one hundred twenty-three".