131031312231 has 8 divisors (see below), whose sum is σ = 175433348464. Its totient is φ = 86991742080.

The previous prime is 131031312197. The next prime is 131031312263. The reversal of 131031312231 is 132213130131.

It is a happy number.

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

It is not a de Polignac number, because 131031312231 - 2¹⁴ = 131031295847 is a prime.

It is a super-2 number, since 2×131031312231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131031312198 and 131031312207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131031312281) 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, 90615676 + ... + 90617121.

It is an arithmetic number, because the mean of its divisors is an integer number (21929168558).

Almost surely, 2^131031312231 is an apocalyptic number.

131031312231 is a deficient number, since it is larger than the sum of its proper divisors (44402036233).

131031312231 is a wasteful number, since it uses less digits than its factorization.

131031312231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181233041.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 131031312231 its reverse (132213130131), we get a palindrome (263244442362).

The spelling of 131031312231 in words is "one hundred thirty-one billion, thirty-one million, three hundred twelve thousand, two hundred thirty-one".