243142454205 has 24 divisors (see below), whose sum is σ = 481653624192. Its totient is φ = 111150836064.

The previous prime is 243142454189. The next prime is 243142454209. The reversal of 243142454205 is 502454241342.

243142454205 is a `hidden beast` number, since 2 + 43 + 142 + 454 + 20 + 5 = 666.

It is not a de Polignac number, because 243142454205 - 2⁴ = 243142454189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243142454205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243142454209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 385940089 + ... + 385940718.

It is an arithmetic number, because the mean of its divisors is an integer number (20068901008).

Almost surely, 2^243142454205 is an apocalyptic number.

It is an amenable number.

243142454205 is a deficient number, since it is larger than the sum of its proper divisors (238511169987).

243142454205 is a wasteful number, since it uses less digits than its factorization.

243142454205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771880825 (or 771880822 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 36.

Adding to 243142454205 its reverse (502454241342), we get a palindrome (745596695547).

The spelling of 243142454205 in words is "two hundred forty-three billion, one hundred forty-two million, four hundred fifty-four thousand, two hundred five".