231031311222 has 16 divisors (see below), whose sum is σ = 462863431152. Its totient is φ = 76876968960.

The previous prime is 231031311169. The next prime is 231031311223. The reversal of 231031311222 is 222113130132.

231031311222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×231031311222³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231031311223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33363279 + ... + 33370202.

It is an arithmetic number, because the mean of its divisors is an integer number (28928964447).

Almost surely, 2^231031311222 is an apocalyptic number.

231031311222 is an abundant number, since it is smaller than the sum of its proper divisors (231832119930).

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

231031311222 is a wasteful number, since it uses less digits than its factorization.

231031311222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66734063.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 231031311222 its reverse (222113130132), we get a palindrome (453144441354).

The spelling of 231031311222 in words is "two hundred thirty-one billion, thirty-one million, three hundred eleven thousand, two hundred twenty-two".