2131043213 has 4 divisors (see below), whose sum is σ = 2294969628. Its totient is φ = 1967116800.

The previous prime is 2131043191. The next prime is 2131043273. The reversal of 2131043213 is 3123401312.

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 290804809 + 1840238404 = 17053^2 + 42898^2 .

It is a cyclic number.

It is not a de Polignac number, because 2131043213 - 2⁸ = 2131042957 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 (2131043273) 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, 81963188 + ... + 81963213.

It is an arithmetic number, because the mean of its divisors is an integer number (573742407).

Almost surely, 2^2131043213 is an apocalyptic number.

It is an amenable number.

2131043213 is a deficient number, since it is larger than the sum of its proper divisors (163926415).

2131043213 is a wasteful number, since it uses less digits than its factorization.

2131043213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163926414.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 2131043213 is about 46163.2235984447. The cubic root of 2131043213 is about 1286.8583714451.

Adding to 2131043213 its reverse (3123401312), we get a palindrome (5254444525).

The spelling of 2131043213 in words is "two billion, one hundred thirty-one million, forty-three thousand, two hundred thirteen".