231311331131 has 8 divisors (see below), whose sum is σ = 241401066144. Its totient is φ = 221224322880.

The previous prime is 231311331059. The next prime is 231311331143. The reversal of 231311331131 is 131133113132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231311331131 - 2¹⁴ = 231311314747 is a prime.

It is a super-2 number, since 2×231311331131² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a junction number, because it is equal to n+sod(n) for n = 231311331097 and 231311331106.

It is not an unprimeable number, because it can be changed into a prime (231311331931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 507380 + ... + 848561.

It is an arithmetic number, because the mean of its divisors is an integer number (30175133268).

Almost surely, 2^231311331131 is an apocalyptic number.

231311331131 is a deficient number, since it is larger than the sum of its proper divisors (10089735013).

231311331131 is a wasteful number, since it uses less digits than its factorization.

231311331131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1363381.

The product of its digits is 486, while the sum is 23.

Adding to 231311331131 its reverse (131133113132), we get a palindrome (362444444263).

The spelling of 231311331131 in words is "two hundred thirty-one billion, three hundred eleven million, three hundred thirty-one thousand, one hundred thirty-one".