243143423241 has 4 divisors (see below), whose sum is σ = 324191230992. Its totient is φ = 162095615492.

The previous prime is 243143423191. The next prime is 243143423251. The reversal of 243143423241 is 142324341342.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 243143423241 - 2¹⁸ = 243143161097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243143423251) 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, 40523903871 + ... + 40523903876.

It is an arithmetic number, because the mean of its divisors is an integer number (81047807748).

Almost surely, 2^243143423241 is an apocalyptic number.

It is an amenable number.

243143423241 is a deficient number, since it is larger than the sum of its proper divisors (81047807751).

243143423241 is an equidigital number, since it uses as much as digits as its factorization.

243143423241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81047807750.

The product of its digits is 55296, while the sum is 33.

Adding to 243143423241 its reverse (142324341342), we get a palindrome (385467764583).

The spelling of 243143423241 in words is "two hundred forty-three billion, one hundred forty-three million, four hundred twenty-three thousand, two hundred forty-one".