2131266331 has 4 divisors (see below), whose sum is σ = 2132759200. Its totient is φ = 2129773464.

The previous prime is 2131266311. The next prime is 2131266343. The reversal of 2131266331 is 1336621312.

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 2131266331 - 2⁵ = 2131266299 is a prime.

It is a super-2 number, since 2×2131266331² = 9084592347308403122, which contains 22 as substring.

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 2131266331.

It is not an unprimeable number, because it can be changed into a prime (2131266311) 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, 744291 + ... + 747148.

It is an arithmetic number, because the mean of its divisors is an integer number (533189800).

Almost surely, 2^2131266331 is an apocalyptic number.

2131266331 is a deficient number, since it is larger than the sum of its proper divisors (1492869).

2131266331 is a wasteful number, since it uses less digits than its factorization.

2131266331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1492868.

The product of its digits is 3888, while the sum is 28.

The square root of 2131266331 is about 46165.6401558562. The cubic root of 2131266331 is about 1286.9032807872.

Adding to 2131266331 its reverse (1336621312), we get a palindrome (3467887643).

The spelling of 2131266331 in words is "two billion, one hundred thirty-one million, two hundred sixty-six thousand, three hundred thirty-one".