2131322313231 has 48 divisors (see below), whose sum is σ = 3284575103264. Its totient is φ = 1380080001024.

The previous prime is 2131322313163. The next prime is 2131322313271. The reversal of 2131322313231 is 1323132231312.

2131322313231 is a `hidden beast` number, since 2 + 1 + 3 + 1 + 322 + 313 + 23 + 1 = 666.

It is not a de Polignac number, because 2131322313231 - 2⁹ = 2131322312719 is a prime.

It is a super-2 number, since 2×2131322313231² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2131322313195 and 2131322313204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131322313271) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4982391 + ... + 5393223.

Almost surely, 2^{2131322313231} is an apocalyptic number.

2131322313231 is a deficient number, since it is larger than the sum of its proper divisors (1153252790033).

2131322313231 is an equidigital number, since it uses as much as digits as its factorization.

2131322313231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411462 (or 411450 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

Adding to 2131322313231 its reverse (1323132231312), we get a palindrome (3454454544543).

The spelling of 2131322313231 in words is "two trillion, one hundred thirty-one billion, three hundred twenty-two million, three hundred thirteen thousand, two hundred thirty-one".