2143213231 has 8 divisors (see below), whose sum is σ = 2150714880. Its totient is φ = 2135722272.

The previous prime is 2143213211. The next prime is 2143213249. The reversal of 2143213231 is 1323123412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2143213231 - 2¹³ = 2143205039 is a prime.

It is a super-2 number, since 2×2143213231² = 9186725907066918722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143213211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 662125 + ... + 665353.

It is an arithmetic number, because the mean of its divisors is an integer number (268839360).

Almost surely, 2^2143213231 is an apocalyptic number.

2143213231 is a deficient number, since it is larger than the sum of its proper divisors (7501649).

2143213231 is a wasteful number, since it uses less digits than its factorization.

2143213231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5345.

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

The square root of 2143213231 is about 46294.8510203889. The cubic root of 2143213231 is about 1289.3033979134.

Adding to 2143213231 its reverse (1323123412), we get a palindrome (3466336643).

The spelling of 2143213231 in words is "two billion, one hundred forty-three million, two hundred thirteen thousand, two hundred thirty-one".