243123432011 has 4 divisors (see below), whose sum is σ = 244345158000. Its totient is φ = 241901706024.

The previous prime is 243123431989. The next prime is 243123432017. The reversal of 243123432011 is 110234321342.

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 243123432011 - 2¹⁰ = 243123430987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243123432017) 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, 610862696 + ... + 610863093.

It is an arithmetic number, because the mean of its divisors is an integer number (61086289500).

Almost surely, 2^243123432011 is an apocalyptic number.

243123432011 is a deficient number, since it is larger than the sum of its proper divisors (1221725989).

243123432011 is a wasteful number, since it uses less digits than its factorization.

243123432011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1221725988.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 243123432011 its reverse (110234321342), we get a palindrome (353357753353).

The spelling of 243123432011 in words is "two hundred forty-three billion, one hundred twenty-three million, four hundred thirty-two thousand, eleven".