243143434242 has 24 divisors (see below), whose sum is σ = 528320274300. Its totient is φ = 80815580640.

The previous prime is 243143434231. The next prime is 243143434277. The reversal of 243143434242 is 242434341342.

243143434242 is a `hidden beast` number, since 2 + 43 + 143 + 434 + 2 + 42 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 232747388721 + 10396045521 = 482439^2 + 101961^2 .

It is a super-2 number, since 2×243143434242² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243143434197 and 243143434206.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19346109 + ... + 19358672.

Almost surely, 2^243143434242 is an apocalyptic number.

243143434242 is an abundant number, since it is smaller than the sum of its proper divisors (285176840058).

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

243143434242 is a wasteful number, since it uses less digits than its factorization.

243143434242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38705138 (or 38705135 counting only the distinct ones).

The product of its digits is 221184, while the sum is 36.

Adding to 243143434242 its reverse (242434341342), we get a palindrome (485577775584).

The spelling of 243143434242 in words is "two hundred forty-three billion, one hundred forty-three million, four hundred thirty-four thousand, two hundred forty-two".