311243421043 has 4 divisors (see below), whose sum is σ = 312426856368. Its totient is φ = 310059985720.

The previous prime is 311243421007. The next prime is 311243421079. The reversal of 311243421043 is 340124342113.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 340124342113 = 10883 ⋅31252811.

It is an interprime number because it is at equal distance from previous prime (311243421007) and next prime (311243421079).

It is a cyclic number.

It is not a de Polignac number, because 311243421043 - 2¹⁷ = 311243289971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311243221043) 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, 591717268 + ... + 591717793.

It is an arithmetic number, because the mean of its divisors is an integer number (78106714092).

Almost surely, 2^311243421043 is an apocalyptic number.

311243421043 is a deficient number, since it is larger than the sum of its proper divisors (1183435325).

311243421043 is a wasteful number, since it uses less digits than its factorization.

311243421043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1183435324.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 311243421043 its reverse (340124342113), we get a palindrome (651367763156).

The spelling of 311243421043 in words is "three hundred eleven billion, two hundred forty-three million, four hundred twenty-one thousand, forty-three".