131313322231 has 24 divisors (see below), whose sum is σ = 168002493120. Its totient is φ = 101685673152.

The previous prime is 131313322223. The next prime is 131313322321. The reversal of 131313322231 is 132223313131.

It is not a de Polignac number, because 131313322231 - 2³ = 131313322223 is a prime.

It is a super-2 number, since 2×131313322231² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131313322196 and 131313322205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131313322531) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2163076 + ... + 2222953.

It is an arithmetic number, because the mean of its divisors is an integer number (7000103880).

Almost surely, 2^131313322231 is an apocalyptic number.

131313322231 is a deficient number, since it is larger than the sum of its proper divisors (36689170889).

131313322231 is a wasteful number, since it uses less digits than its factorization.

131313322231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4386103 (or 4386096 counting only the distinct ones).

The product of its digits is 1944, while the sum is 25.

Adding to 131313322231 its reverse (132223313131), we get a palindrome (263536635362).

The spelling of 131313322231 in words is "one hundred thirty-one billion, three hundred thirteen million, three hundred twenty-two thousand, two hundred thirty-one".