131113231 has 8 divisors (see below), whose sum is σ = 139311360. Its totient is φ = 123396064.

The previous prime is 131113223. The next prime is 131113259. The reversal of 131113231 is 132311131.

It is not a de Polignac number, because 131113231 - 2³ = 131113223 is a prime.

It is a super-2 number, since 2×131113231² = 34381358686518722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131113211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8431 + ... + 18256.

It is an arithmetic number, because the mean of its divisors is an integer number (17413920).

Almost surely, 2^131113231 is an apocalyptic number.

131113231 is a deficient number, since it is larger than the sum of its proper divisors (8198129).

131113231 is an frugal number, since it uses more digits than its factorization.

131113231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26738 (or 26704 counting only the distinct ones).

The product of its digits is 54, while the sum is 16.

The square root of 131113231 is about 11450.4685930315. The cubic root of 131113231 is about 508.0215945002.

Adding to 131113231 its reverse (132311131), we get a palindrome (263424362).

The spelling of 131113231 in words is "one hundred thirty-one million, one hundred thirteen thousand, two hundred thirty-one".