2131323133 has 4 divisors (see below), whose sum is σ = 2256695100. Its totient is φ = 2005951168.

The previous prime is 2131323127. The next prime is 2131323143. The reversal of 2131323133 is 3313231312.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1733639769 + 397683364 = 41637^2 + 19942^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2131323133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131323113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62685958 + ... + 62685991.

It is an arithmetic number, because the mean of its divisors is an integer number (564173775).

Almost surely, 2^2131323133 is an apocalyptic number.

It is an amenable number.

2131323133 is a deficient number, since it is larger than the sum of its proper divisors (125371967).

2131323133 is a wasteful number, since it uses less digits than its factorization.

2131323133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125371966.

The product of its digits is 972, while the sum is 22.

The square root of 2131323133 is about 46166.2553495516. The cubic root of 2131323133 is about 1286.9147134317.

Adding to 2131323133 its reverse (3313231312), we get a palindrome (5444554445).

The spelling of 2131323133 in words is "two billion, one hundred thirty-one million, three hundred twenty-three thousand, one hundred thirty-three".