231312320222 has 32 divisors (see below), whose sum is σ = 349536837600. Its totient is φ = 114804518400.

The previous prime is 231312320203. The next prime is 231312320231. The reversal of 231312320222 is 222023213132.

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, 279025304 + ... + 279026132.

It is an arithmetic number, because the mean of its divisors is an integer number (10923026175).

Almost surely, 2^231312320222 is an apocalyptic number.

231312320222 is a deficient number, since it is larger than the sum of its proper divisors (118224517378).

231312320222 is a wasteful number, since it uses less digits than its factorization.

231312320222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2492.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 231312320222 its reverse (222023213132), we get a palindrome (453335533354).

The spelling of 231312320222 in words is "two hundred thirty-one billion, three hundred twelve million, three hundred twenty thousand, two hundred twenty-two".