231311223330 has 256 divisors, whose sum is σ = 650239819776. Its totient is φ = 52101969920.

The previous prime is 231311223289. The next prime is 231311223359. The reversal of 231311223330 is 33322113132.

231311223330 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-2 number, since 2×231311223330² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 231311223330.

It is an unprimeable number.

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 127 ways as a sum of consecutive naturals, for example, 48869644 + ... + 48874376.

It is an arithmetic number, because the mean of its divisors is an integer number (2539999296).

Almost surely, 2^231311223330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231311223330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (325119909888).

231311223330 is an abundant number, since it is smaller than the sum of its proper divisors (418928596446).

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

231311223330 is a wasteful number, since it uses less digits than its factorization.

231311223330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4961.

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 231311223330 its reverse (33322113132), we get a palindrome (264633336462).

The spelling of 231311223330 in words is "two hundred thirty-one billion, three hundred eleven million, two hundred twenty-three thousand, three hundred thirty".