2131320031 has 2 divisors, whose sum is σ = 2131320032. Its totient is φ = 2131320030.

The previous prime is 2131319999. The next prime is 2131320067. The reversal of 2131320031 is 1300231312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2131320031 - 2⁵ = 2131319999 is a prime.

It is a super-2 number, since 2×2131320031² = 9085050149083681922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2131319987 and 2131320014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2131320131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065660015 + 1065660016.

It is an arithmetic number, because the mean of its divisors is an integer number (1065660016).

Almost surely, 2^2131320031 is an apocalyptic number.

2131320031 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131320031 is an equidigital number, since it uses as much as digits as its factorization.

2131320031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 2131320031 is about 46166.2217535722. The cubic root of 2131320031 is about 1286.9140890916.

Adding to 2131320031 its reverse (1300231312), we get a palindrome (3431551343).

The spelling of 2131320031 in words is "two billion, one hundred thirty-one million, three hundred twenty thousand, thirty-one".