2037221 has 4 divisors (see below), whose sum is σ = 2107500. Its totient is φ = 1966944.

The previous prime is 2037209. The next prime is 2037223. The reversal of 2037221 is 1227302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1227302 = 2 ⋅613651.

It can be written as a sum of positive squares in 2 ways, for example, as 474721 + 1562500 = 689^2 + 1250^2 .

It is a cyclic number.

It is not a de Polignac number, because 2037221 - 2⁶ = 2037157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2037221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2037223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35096 + ... + 35153.

It is an arithmetic number, because the mean of its divisors is an integer number (526875).

2^2037221 is an apocalyptic number.

It is an amenable number.

2037221 is a deficient number, since it is larger than the sum of its proper divisors (70279).

2037221 is an equidigital number, since it uses as much as digits as its factorization.

2037221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70278.

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

The square root of 2037221 is about 1427.3125095788. The cubic root of 2037221 is about 126.7688979236.

The spelling of 2037221 in words is "two million, thirty-seven thousand, two hundred twenty-one".