311331143240442 has 48 divisors (see below), whose sum is σ = 726509008985760. Its totient is φ = 95785010040096.

The previous prime is 311331143240317. The next prime is 311331143240473. The reversal of 311331143240442 is 244042341133113.

311331143240442 is a `hidden beast` number, since 3 + 1 + 1 + 3 + 31 + 143 + 2 + 40 + 442 = 666.

It is a super-2 number, since 2×311331143240442² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 311331143240397 and 311331143240406.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61359592 + ... + 66239427.

It is an arithmetic number, because the mean of its divisors is an integer number (15135604353870).

Almost surely, 2^{311331143240442} is an apocalyptic number.

311331143240442 is an abundant number, since it is smaller than the sum of its proper divisors (415177865745318).

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

311331143240442 is a wasteful number, since it uses less digits than its factorization.

311331143240442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127609467 (or 127609464 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

Adding to 311331143240442 its reverse (244042341133113), we get a palindrome (555373484373555).

The spelling of 311331143240442 in words is "three hundred eleven trillion, three hundred thirty-one billion, one hundred forty-three million, two hundred forty thousand, four hundred forty-two".