2131110031 has 4 divisors (see below), whose sum is σ = 2167230600. Its totient is φ = 2094989464.

The previous prime is 2131110029. The next prime is 2131110043. The reversal of 2131110031 is 1300111312.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2131110031 - 2¹ = 2131110029 is a prime.

It is a super-2 number, since 2×2131110031² = 9083259928457641922, 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 = 2131109993 and 2131110020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131110001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18060196 + ... + 18060313.

It is an arithmetic number, because the mean of its divisors is an integer number (541807650).

Almost surely, 2^2131110031 is an apocalyptic number.

2131110031 is a deficient number, since it is larger than the sum of its proper divisors (36120569).

2131110031 is an equidigital number, since it uses as much as digits as its factorization.

2131110031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36120568.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 2131110031 is about 46163.9473073956. The cubic root of 2131110031 is about 1286.8718209462.

Adding to 2131110031 its reverse (1300111312), we get a palindrome (3431221343).

The spelling of 2131110031 in words is "two billion, one hundred thirty-one million, one hundred ten thousand, thirty-one".