243143434241 has 4 divisors (see below), whose sum is σ = 244918203972. Its totient is φ = 241368664512.

The previous prime is 243143434231. The next prime is 243143434277. The reversal of 243143434241 is 142434341342.

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 195610713841 + 47532720400 = 442279^2 + 218020^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243143434241 is a prime.

It is a super-2 number, since 2×243143434241² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243143434231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 887384660 + ... + 887384933.

It is an arithmetic number, because the mean of its divisors is an integer number (61229550993).

Almost surely, 2^243143434241 is an apocalyptic number.

It is an amenable number.

243143434241 is a deficient number, since it is larger than the sum of its proper divisors (1774769731).

243143434241 is a wasteful number, since it uses less digits than its factorization.

243143434241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1774769730.

The product of its digits is 110592, while the sum is 35.

Adding to 243143434241 its reverse (142434341342), we get a palindrome (385577775583).

The spelling of 243143434241 in words is "two hundred forty-three billion, one hundred forty-three million, four hundred thirty-four thousand, two hundred forty-one".