311142228044 has 24 divisors (see below), whose sum is σ = 547279315968. Its totient is φ = 154777574160.

The previous prime is 311142228029. The next prime is 311142228049. The reversal of 311142228044 is 440822241113.

It is a self number, because there is not a number n which added to its sum of digits gives 311142228044.

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 7 ways as a sum of consecutive naturals, for example, 1344089 + ... + 1558479.

It is an arithmetic number, because the mean of its divisors is an integer number (22803304832).

Almost surely, 2^311142228044 is an apocalyptic number.

It is an amenable number.

311142228044 is a deficient number, since it is larger than the sum of its proper divisors (236137087924).

311142228044 is a wasteful number, since it uses less digits than its factorization.

311142228044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216245 (or 216243 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 32.

Adding to 311142228044 its reverse (440822241113), we get a palindrome (751964469157).

The spelling of 311142228044 in words is "three hundred eleven billion, one hundred forty-two million, two hundred twenty-eight thousand, forty-four".