231321331242 has 24 divisors (see below), whose sum is σ = 501328155744. Its totient is φ = 77086812264.

The previous prime is 231321331187. The next prime is 231321331273. The reversal of 231321331242 is 242133123132.

231321331242 is a `hidden beast` number, since 2 + 3 + 1 + 321 + 331 + 2 + 4 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1621158 + ... + 1758065.

It is an arithmetic number, because the mean of its divisors is an integer number (20888673156).

Almost surely, 2^231321331242 is an apocalyptic number.

231321331242 is an abundant number, since it is smaller than the sum of its proper divisors (270006824502).

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

231321331242 is a wasteful number, since it uses less digits than its factorization.

231321331242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3383034 (or 3383031 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

Adding to 231321331242 its reverse (242133123132), we get a palindrome (473454454374).

The spelling of 231321331242 in words is "two hundred thirty-one billion, three hundred twenty-one million, three hundred thirty-one thousand, two hundred forty-two".