311130242443 has 4 divisors (see below), whose sum is σ = 311136669328. Its totient is φ = 311123815560.

The previous prime is 311130242417. The next prime is 311130242447. The reversal of 311130242443 is 344242031113.

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: 344242031113 = 23 ⋅14967044831.

It is a cyclic number.

It is not a de Polignac number, because 311130242443 - 2³³ = 302540307851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311130242447) 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, 3140271 + ... + 3237832.

It is an arithmetic number, because the mean of its divisors is an integer number (77784167332).

Almost surely, 2^311130242443 is an apocalyptic number.

311130242443 is a deficient number, since it is larger than the sum of its proper divisors (6426885).

311130242443 is an equidigital number, since it uses as much as digits as its factorization.

311130242443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6426884.

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

Adding to 311130242443 its reverse (344242031113), we get a palindrome (655372273556).

The spelling of 311130242443 in words is "three hundred eleven billion, one hundred thirty million, two hundred forty-two thousand, four hundred forty-three".