311331232542 has 32 divisors (see below), whose sum is σ = 683766630144. Its totient is φ = 93718008000.

The previous prime is 311331232507. The next prime is 311331232571. The reversal of 311331232542 is 245232133113.

311331232542 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×311331232542² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15609703 + ... + 15629634.

It is an arithmetic number, because the mean of its divisors is an integer number (21367707192).

Almost surely, 2^311331232542 is an apocalyptic number.

311331232542 is an abundant number, since it is smaller than the sum of its proper divisors (372435397602).

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

311331232542 is a wasteful number, since it uses less digits than its factorization.

311331232542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31239504.

The product of its digits is 12960, while the sum is 30.

Adding to 311331232542 its reverse (245232133113), we get a palindrome (556563365655).

The spelling of 311331232542 in words is "three hundred eleven billion, three hundred thirty-one million, two hundred thirty-two thousand, five hundred forty-two".