2131330331 has 4 divisors (see below), whose sum is σ = 2295278832. Its totient is φ = 1967381832.

The previous prime is 2131330261. The next prime is 2131330343. The reversal of 2131330331 is 1330331312.

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

It is not a de Polignac number, because 2131330331 - 2¹⁰ = 2131329307 is a prime.

It is a super-2 number, since 2×2131330331² = 9085137959681139122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2131330361) 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, 81974231 + ... + 81974256.

It is an arithmetic number, because the mean of its divisors is an integer number (573819708).

Almost surely, 2^2131330331 is an apocalyptic number.

2131330331 is a deficient number, since it is larger than the sum of its proper divisors (163948501).

2131330331 is a wasteful number, since it uses less digits than its factorization.

2131330331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163948500.

The product of its (nonzero) digits is 486, while the sum is 20.

The square root of 2131330331 is about 46166.3333068590. Note that the first 4 decimals coincide. The cubic root of 2131330331 is about 1286.9161621721.

Adding to 2131330331 its reverse (1330331312), we get a palindrome (3461661643).

The spelling of 2131330331 in words is "two billion, one hundred thirty-one million, three hundred thirty thousand, three hundred thirty-one".