2031131131 has 4 divisors (see below), whose sum is σ = 2033925712. Its totient is φ = 2028336552.

The previous prime is 2031131077. The next prime is 2031131143. The reversal of 2031131131 is 1311311302.

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 2031131131 - 2¹⁹ = 2030606843 is a prime.

It is a super-2 number, since 2×2031131131² = 8250987342634678322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2031131231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1396200 + ... + 1397653.

It is an arithmetic number, because the mean of its divisors is an integer number (508481428).

Almost surely, 2^2031131131 is an apocalyptic number.

2031131131 is a deficient number, since it is larger than the sum of its proper divisors (2794581).

2031131131 is an equidigital number, since it uses as much as digits as its factorization.

2031131131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2794580.

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

The square root of 2031131131 is about 45068.0721908537. The cubic root of 2031131131 is about 1266.4245500379.

Adding to 2031131131 its reverse (1311311302), we get a palindrome (3342442433).

The spelling of 2031131131 in words is "two billion, thirty-one million, one hundred thirty-one thousand, one hundred thirty-one".