2243021 has 4 divisors (see below), whose sum is σ = 2446944. Its totient is φ = 2039100.

The previous prime is 2242993. The next prime is 2243027. The reversal of 2243021 is 1203422.

2243021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2243021 - 2⁶ = 2242957 is a prime.

It is a super-2 number, since 2×2243021² = 10062286412882, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 2242987 and 2243005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2243027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101945 + ... + 101966.

It is an arithmetic number, because the mean of its divisors is an integer number (611736).

2^2243021 is an apocalyptic number.

It is an amenable number.

2243021 is a deficient number, since it is larger than the sum of its proper divisors (203923).

2243021 is a wasteful number, since it uses less digits than its factorization.

2243021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203922.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 2243021 is about 1497.6718599213. The cubic root of 2243021 is about 130.9014467659.

Adding to 2243021 its reverse (1203422), we get a palindrome (3446443).

The spelling of 2243021 in words is "two million, two hundred forty-three thousand, twenty-one".