2143212313 has 4 divisors (see below), whose sum is σ = 2338049808. Its totient is φ = 1948374820.

The previous prime is 2143212307. The next prime is 2143212371. The reversal of 2143212313 is 3132123412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2143212313 - 2⁹ = 2143211801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2143212413) 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, 97418731 + ... + 97418752.

It is an arithmetic number, because the mean of its divisors is an integer number (584512452).

Almost surely, 2^2143212313 is an apocalyptic number.

It is an amenable number.

2143212313 is a deficient number, since it is larger than the sum of its proper divisors (194837495).

2143212313 is a wasteful number, since it uses less digits than its factorization.

2143212313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194837494.

The product of its digits is 864, while the sum is 22.

The square root of 2143212313 is about 46294.8411056783. The cubic root of 2143212313 is about 1289.3032138315.

Adding to 2143212313 its reverse (3132123412), we get a palindrome (5275335725).

The spelling of 2143212313 in words is "two billion, one hundred forty-three million, two hundred twelve thousand, three hundred thirteen".