311103043243 has 4 divisors (see below), whose sum is σ = 311135361840. Its totient is φ = 311070724648.

The previous prime is 311103043241. The next prime is 311103043249. The reversal of 311103043243 is 342340301113.

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 311103043243 - 2¹ = 311103043241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311103043241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16144855 + ... + 16164112.

It is an arithmetic number, because the mean of its divisors is an integer number (77783840460).

Almost surely, 2^311103043243 is an apocalyptic number.

311103043243 is a deficient number, since it is larger than the sum of its proper divisors (32318597).

311103043243 is an equidigital number, since it uses as much as digits as its factorization.

311103043243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32318596.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 311103043243 its reverse (342340301113), we get a palindrome (653443344356).

The spelling of 311103043243 in words is "three hundred eleven billion, one hundred three million, forty-three thousand, two hundred forty-three".