231031200312 has 48 divisors (see below), whose sum is σ = 682592185080. Its totient is φ = 70009454400.

The previous prime is 231031200311. The next prime is 231031200329. The reversal of 231031200312 is 213002130132.

231031200312 is a `hidden beast` number, since 231 + 0 + 3 + 120 + 0 + 312 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231031200311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 145852239 + ... + 145853822.

Almost surely, 2^231031200312 is an apocalyptic number.

231031200312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

231031200312 is an abundant number, since it is smaller than the sum of its proper divisors (451560984768).

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

231031200312 is a wasteful number, since it uses less digits than its factorization.

231031200312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291706084 (or 291706077 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 231031200312 its reverse (213002130132), we get a palindrome (444033330444).

The spelling of 231031200312 in words is "two hundred thirty-one billion, thirty-one million, two hundred thousand, three hundred twelve".