243221340043043 has 4 divisors (see below), whose sum is σ = 243550462290120. Its totient is φ = 242892217795968.

The previous prime is 243221340042899. The next prime is 243221340043061. The reversal of 243221340043043 is 340340043122342.

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 243221340043043 - 2¹² = 243221340038947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243221340042994 and 243221340043012.

It is not an unprimeable number, because it can be changed into a prime (243221340043543) 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, 164561122430 + ... + 164561123907.

It is an arithmetic number, because the mean of its divisors is an integer number (60887615572530).

Almost surely, 2^{243221340043043} is an apocalyptic number.

243221340043043 is a deficient number, since it is larger than the sum of its proper divisors (329122247077).

243221340043043 is an equidigital number, since it uses as much as digits as its factorization.

243221340043043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329122247076.

The product of its (nonzero) digits is 165888, while the sum is 35.

Adding to 243221340043043 its reverse (340340043122342), we get a palindrome (583561383165385).

The spelling of 243221340043043 in words is "two hundred forty-three trillion, two hundred twenty-one billion, three hundred forty million, forty-three thousand, forty-three".