231312402222 has 32 divisors (see below), whose sum is σ = 504841317120. Its totient is φ = 70072485120.

The previous prime is 231312402133. The next prime is 231312402227. The reversal of 231312402222 is 222204213132.

It is a junction number, because it is equal to n+sod(n) for n = 231312402192 and 231312402201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231312402227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 343818 + ... + 762125.

It is an arithmetic number, because the mean of its divisors is an integer number (15776291160).

Almost surely, 2^231312402222 is an apocalyptic number.

231312402222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

231312402222 is an abundant number, since it is smaller than the sum of its proper divisors (273528914898).

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

231312402222 is a wasteful number, since it uses less digits than its factorization.

231312402222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1109128.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 231312402222 its reverse (222204213132), we get a palindrome (453516615354).

The spelling of 231312402222 in words is "two hundred thirty-one billion, three hundred twelve million, four hundred two thousand, two hundred twenty-two".