2131323331 has 4 divisors (see below), whose sum is σ = 2132756200. Its totient is φ = 2129890464.

The previous prime is 2131323329. The next prime is 2131323343. The reversal of 2131323331 is 1333231312.

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 2131323331 - 2¹ = 2131323329 is a prime.

It is a super-2 number, since 2×2131323331² = 9085078282529871122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2131323301) 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, 714201 + ... + 717178.

It is an arithmetic number, because the mean of its divisors is an integer number (533189050).

Almost surely, 2^2131323331 is an apocalyptic number.

2131323331 is a deficient number, since it is larger than the sum of its proper divisors (1432869).

2131323331 is a wasteful number, since it uses less digits than its factorization.

2131323331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1432868.

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

The square root of 2131323331 is about 46166.2574939750. The cubic root of 2131323331 is about 1286.9147532832.

Adding to 2131323331 its reverse (1333231312), we get a palindrome (3464554643).

It can be divided in two parts, 21313 and 23331, that added together give a palindrome (44644).

The spelling of 2131323331 in words is "two billion, one hundred thirty-one million, three hundred twenty-three thousand, three hundred thirty-one".