2143213 has 4 divisors (see below), whose sum is σ = 2152348. Its totient is φ = 2134080.

The previous prime is 2143201. The next prime is 2143217. The reversal of 2143213 is 3123412.

It is a happy number.

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 917764 + 1225449 = 958^2 + 1107^2 .

It is a cyclic number.

It is not a de Polignac number, because 2143213 - 2²¹ = 46061 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 (2143217) 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, 4206 + ... + 4687.

It is an arithmetic number, because the mean of its divisors is an integer number (538087).

2^2143213 is an apocalyptic number.

It is an amenable number.

2143213 is a deficient number, since it is larger than the sum of its proper divisors (9135).

2143213 is an equidigital number, since it uses as much as digits as its factorization.

2143213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9134.

The product of its digits is 144, while the sum is 16.

The square root of 2143213 is about 1463.9716527310. The cubic root of 2143213 is about 128.9303351592.

Adding to 2143213 its reverse (3123412), we get a palindrome (5266625).

It can be divided in two parts, 21 and 43213, that added together give a palindrome (43234).

The spelling of 2143213 in words is "two million, one hundred forty-three thousand, two hundred thirteen".