2021343 has 4 divisors (see below), whose sum is σ = 2695128. Its totient is φ = 1347560.

The previous prime is 2021339. The next prime is 2021377. The reversal of 2021343 is 3431202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2021343 - 2² = 2021339 is a prime.

It is a D-number.

2021343 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 336888 + ... + 336893.

It is an arithmetic number, because the mean of its divisors is an integer number (673782).

2^2021343 is an apocalyptic number.

2021343 is a deficient number, since it is larger than the sum of its proper divisors (673785).

2021343 is an equidigital number, since it uses as much as digits as its factorization.

2021343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673784.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 2021343 is about 1421.7394276027. The cubic root of 2021343 is about 126.4386950576.

Adding to 2021343 its reverse (3431202), we get a palindrome (5452545).

The spelling of 2021343 in words is "two million, twenty-one thousand, three hundred forty-three".