231310022022 has 24 divisors (see below), whose sum is σ = 501946348176. Its totient is φ = 76984166256.

The previous prime is 231310021967. The next prime is 231310022023. The reversal of 231310022022 is 220220013132.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 231310021986 and 231310022004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231310022023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9919233 + ... + 9942524.

It is an arithmetic number, because the mean of its divisors is an integer number (20914431174).

Almost surely, 2^231310022022 is an apocalyptic number.

231310022022 is an abundant number, since it is smaller than the sum of its proper divisors (270636326154).

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

231310022022 is a wasteful number, since it uses less digits than its factorization.

231310022022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19862412 (or 19862409 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 231310022022 its reverse (220220013132), we get a palindrome (451530035154).

The spelling of 231310022022 in words is "two hundred thirty-one billion, three hundred ten million, twenty-two thousand, twenty-two".