2113131031 has 4 divisors (see below), whose sum is σ = 2305233864. Its totient is φ = 1921028200.

The previous prime is 2113131011. The next prime is 2113131043. The reversal of 2113131031 is 1301313112.

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

It is a cyclic number.

It is not a de Polignac number, because 2113131031 - 2⁹ = 2113130519 is a prime.

It is a super-2 number, since 2×2113131031² = 8930645508350245922, 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 = 2113130996 and 2113131014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2113131011) 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, 96051400 + ... + 96051421.

It is an arithmetic number, because the mean of its divisors is an integer number (576308466).

Almost surely, 2^2113131031 is an apocalyptic number.

2113131031 is a deficient number, since it is larger than the sum of its proper divisors (192102833).

2113131031 is a wasteful number, since it uses less digits than its factorization.

2113131031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192102832.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 2113131031 is about 45968.8049768536. The cubic root of 2113131031 is about 1283.2427202152.

Adding to 2113131031 its reverse (1301313112), we get a palindrome (3414444143).

The spelling of 2113131031 in words is "two billion, one hundred thirteen million, one hundred thirty-one thousand, thirty-one".