311142228043 has 4 divisors (see below), whose sum is σ = 316242920368. Its totient is φ = 306041535720.

The previous prime is 311142228029. The next prime is 311142228049. The reversal of 311142228043 is 340822241113.

It is a happy number.

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 311142228043 - 2¹³ = 311142219851 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311142227996 and 311142228014.

It is not an unprimeable number, because it can be changed into a prime (311142228049) 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, 2550346071 + ... + 2550346192.

It is an arithmetic number, because the mean of its divisors is an integer number (79060730092).

Almost surely, 2^311142228043 is an apocalyptic number.

311142228043 is a deficient number, since it is larger than the sum of its proper divisors (5100692325).

311142228043 is an equidigital number, since it uses as much as digits as its factorization.

311142228043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5100692324.

The product of its (nonzero) digits is 9216, while the sum is 31.

Adding to 311142228043 its reverse (340822241113), we get a palindrome (651964469156).

The spelling of 311142228043 in words is "three hundred eleven billion, one hundred forty-two million, two hundred twenty-eight thousand, forty-three".