231131312230 has 64 divisors (see below), whose sum is σ = 512728086528. Its totient is φ = 73051632000.

The previous prime is 231131312219. The next prime is 231131312257. The reversal of 231131312230 is 32213131132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 514309 + ... + 852511.

It is an arithmetic number, because the mean of its divisors is an integer number (8011376352).

Almost surely, 2^231131312230 is an apocalyptic number.

231131312230 is an abundant number, since it is smaller than the sum of its proper divisors (281596774298).

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

231131312230 is a wasteful number, since it uses less digits than its factorization.

231131312230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338981.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 231131312230 its reverse (32213131132), we get a palindrome (263344443362).

The spelling of 231131312230 in words is "two hundred thirty-one billion, one hundred thirty-one million, three hundred twelve thousand, two hundred thirty".