2031131323 has 4 divisors (see below), whose sum is σ = 2187372208. Its totient is φ = 1874890440.

The previous prime is 2031131309. The next prime is 2031131327. The reversal of 2031131323 is 3231311302.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2031131323 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2031131323.

It is not an unprimeable number, because it can be changed into a prime (2031131327) 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, 78120423 + ... + 78120448.

It is an arithmetic number, because the mean of its divisors is an integer number (546843052).

Almost surely, 2^2031131323 is an apocalyptic number.

2031131323 is a deficient number, since it is larger than the sum of its proper divisors (156240885).

2031131323 is a wasteful number, since it uses less digits than its factorization.

2031131323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156240884.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 2031131323 is about 45068.0743209647. The cubic root of 2031131323 is about 1266.4245899423.

Adding to 2031131323 its reverse (3231311302), we get a palindrome (5262442625).

The spelling of 2031131323 in words is "two billion, thirty-one million, one hundred thirty-one thousand, three hundred twenty-three".