2073221 has 8 divisors (see below), whose sum is σ = 2150040. Its totient is φ = 1997568.

The previous prime is 2073209. The next prime is 2073233. The reversal of 2073221 is 1223702.

It is an interprime number because it is at equal distance from previous prime (2073209) and next prime (2073233).

It can be written as a sum of positive squares in 4 ways, for example, as 1288225 + 784996 = 1135^2 + 886^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2073221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2073221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2073241) 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 7 ways as a sum of consecutive naturals, for example, 4865 + ... + 5273.

It is an arithmetic number, because the mean of its divisors is an integer number (268755).

2^2073221 is an apocalyptic number.

It is an amenable number.

2073221 is a deficient number, since it is larger than the sum of its proper divisors (76819).

2073221 is a wasteful number, since it uses less digits than its factorization.

2073221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 2073221 is about 1439.8683967641. The cubic root of 2073221 is about 127.5112587777.

Adding to 2073221 its reverse (1223702), we get a palindrome (3296923).

The spelling of 2073221 in words is "two million, seventy-three thousand, two hundred twenty-one".