231131203312 has 40 divisors (see below), whose sum is σ = 474192306000. Its totient is φ = 108759954432.

The previous prime is 231131203271. The next prime is 231131203333. The reversal of 231131203312 is 213302131132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6245439 + ... + 6282337.

It is an arithmetic number, because the mean of its divisors is an integer number (11854807650).

Almost surely, 2^231131203312 is an apocalyptic number.

It is an amenable number.

231131203312 is an abundant number, since it is smaller than the sum of its proper divisors (243061102688).

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

231131203312 is a wasteful number, since it uses less digits than its factorization.

231131203312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59953 (or 59947 counting only the distinct ones).

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

Adding to 231131203312 its reverse (213302131132), we get a palindrome (444433334444).

The spelling of 231131203312 in words is "two hundred thirty-one billion, one hundred thirty-one million, two hundred three thousand, three hundred twelve".