2243410021 has 4 divisors (see below), whose sum is σ = 2244592044. Its totient is φ = 2242228000.

The previous prime is 2243410019. The next prime is 2243410051. The reversal of 2243410021 is 1200143422.

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 551733121 + 1691676900 = 23489^2 + 41130^2 .

It is a cyclic number.

It is not a de Polignac number, because 2243410021 - 2¹ = 2243410019 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 (2243410051) 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, 588160 + ... + 591961.

It is an arithmetic number, because the mean of its divisors is an integer number (561148011).

Almost surely, 2^2243410021 is an apocalyptic number.

It is an amenable number.

2243410021 is a deficient number, since it is larger than the sum of its proper divisors (1182023).

2243410021 is a wasteful number, since it uses less digits than its factorization.

2243410021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1182022.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 2243410021 is about 47364.6494867216. The cubic root of 2243410021 is about 1309.0901401088.

Adding to 2243410021 its reverse (1200143422), we get a palindrome (3443553443).

The spelling of 2243410021 in words is "two billion, two hundred forty-three million, four hundred ten thousand, twenty-one".