231310021332 has 48 divisors (see below), whose sum is σ = 581919129792. Its totient is φ = 71089224960.

The previous prime is 231310021309. The next prime is 231310021367. The reversal of 231310021332 is 233120013132.

It is a super-2 number, since 2×231310021332² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231310021299 and 231310021308.

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, 731394 + ... + 998777.

It is an arithmetic number, because the mean of its divisors is an integer number (12123315204).

Almost surely, 2^231310021332 is an apocalyptic number.

It is an amenable number.

231310021332 is an abundant number, since it is smaller than the sum of its proper divisors (350609108460).

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

231310021332 is a wasteful number, since it uses less digits than its factorization.

231310021332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1731048 (or 1731046 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 231310021332 its reverse (233120013132), we get a palindrome (464430034464).

The spelling of 231310021332 in words is "two hundred thirty-one billion, three hundred ten million, twenty-one thousand, three hundred thirty-two".