131404231 has 6 divisors (see below), whose sum is σ = 152858040. Its totient is φ = 112632156.

The previous prime is 131404213. The next prime is 131404253. The reversal of 131404231 is 132404131.

It is not a de Polignac number, because 131404231 - 2⁷ = 131404103 is a prime.

It is a super-2 number, since 2×131404231² = 34534143849402722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131404199 and 131404208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131404201) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1340811 + ... + 1340908.

It is an arithmetic number, because the mean of its divisors is an integer number (25476340).

Almost surely, 2^131404231 is an apocalyptic number.

131404231 is a deficient number, since it is larger than the sum of its proper divisors (21453809).

131404231 is an equidigital number, since it uses as much as digits as its factorization.

131404231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2681733 (or 2681726 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 131404231 is about 11463.1684537915. The cubic root of 131404231 is about 508.3971605840.

Adding to 131404231 its reverse (132404131), we get a palindrome (263808362).

It can be divided in two parts, 13140 and 4231, that added together give a palindrome (17371).

The spelling of 131404231 in words is "one hundred thirty-one million, four hundred four thousand, two hundred thirty-one".