231131241243 has 18 divisors (see below), whose sum is σ = 388363378884. Its totient is φ = 132074994744.

The previous prime is 231131241217. The next prime is 231131241247. The reversal of 231131241243 is 342142131132.

231131241243 is a `hidden beast` number, since 231 + 1 + 3 + 12 + 412 + 4 + 3 = 666.

It is not a de Polignac number, because 231131241243 - 2⁸ = 231131240987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231131241247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 262053121 + ... + 262054002.

Almost surely, 2^231131241243 is an apocalyptic number.

231131241243 is a deficient number, since it is larger than the sum of its proper divisors (157232137641).

231131241243 is a wasteful number, since it uses less digits than its factorization.

231131241243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524107143 (or 524107133 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

Adding to 231131241243 its reverse (342142131132), we get a palindrome (573273372375).

The spelling of 231131241243 in words is "two hundred thirty-one billion, one hundred thirty-one million, two hundred forty-one thousand, two hundred forty-three".