311203103442 has 256 divisors, whose sum is σ = 817114521600. Its totient is φ = 76747641600.

The previous prime is 311203103437. The next prime is 311203103447. The reversal of 311203103442 is 244301302113.

It is a happy number.

311203103442 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (311203103437) and next prime (311203103447).

It is not an unprimeable number, because it can be changed into a prime (311203103447) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 800007784 + ... + 800008172.

It is an arithmetic number, because the mean of its divisors is an integer number (3191853600).

Almost surely, 2^311203103442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 311203103442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (408557260800).

311203103442 is an abundant number, since it is smaller than the sum of its proper divisors (505911418158).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

311203103442 is a wasteful number, since it uses less digits than its factorization.

311203103442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570 (or 512 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 311203103442 its reverse (244301302113), we get a palindrome (555504405555).

The spelling of 311203103442 in words is "three hundred eleven billion, two hundred three million, one hundred three thousand, four hundred forty-two".