2143312 has 20 divisors (see below), whose sum is σ = 4198516. Its totient is φ = 1059840.

The previous prime is 2143279. The next prime is 2143313. The reversal of 2143312 is 2133412.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 968256 + 1175056 = 984^2 + 1084^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 862 + ... + 2242.

2^2143312 is an apocalyptic number.

It is an amenable number.

2143312 is a deficient number, since it is larger than the sum of its proper divisors (2055204).

2143312 is a wasteful number, since it uses less digits than its factorization.

2143312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1486 (or 1480 counting only the distinct ones).

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

The square root of 2143312 is about 1464.0054644707. The cubic root of 2143312 is about 128.9323203261.

Subtracting from 2143312 its sum of digits (16), we obtain a square (2143296 = 1464²).

Adding to 2143312 its reverse (2133412), we get a palindrome (4276724).

The spelling of 2143312 in words is "two million, one hundred forty-three thousand, three hundred twelve".