243143434243 has 4 divisors (see below), whose sum is σ = 243144750240. Its totient is φ = 243142118248.

The previous prime is 243143434231. The next prime is 243143434277. The reversal of 243143434243 is 342434341342.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 243143434243 - 2²¹ = 243141337091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243143434213) 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, 324523 + ... + 769156.

It is an arithmetic number, because the mean of its divisors is an integer number (60786187560).

Almost surely, 2^243143434243 is an apocalyptic number.

243143434243 is a deficient number, since it is larger than the sum of its proper divisors (1315997).

243143434243 is a wasteful number, since it uses less digits than its factorization.

243143434243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315996.

The product of its digits is 331776, while the sum is 37.

Adding to 243143434243 its reverse (342434341342), we get a palindrome (585577775585).

The spelling of 243143434243 in words is "two hundred forty-three billion, one hundred forty-three million, four hundred thirty-four thousand, two hundred forty-three".