2250221 has 4 divisors (see below), whose sum is σ = 2292732. Its totient is φ = 2207712.

The previous prime is 2250181. The next prime is 2250223. The reversal of 2250221 is 1220522.

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 1876900 + 373321 = 1370^2 + 611^2 .

It is a cyclic number.

It is not a de Polignac number, because 2250221 - 2¹⁰ = 2249197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2250196 and 2250205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2250223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21176 + ... + 21281.

It is an arithmetic number, because the mean of its divisors is an integer number (573183).

2^2250221 is an apocalyptic number.

It is an amenable number.

2250221 is a deficient number, since it is larger than the sum of its proper divisors (42511).

2250221 is an equidigital number, since it uses as much as digits as its factorization.

2250221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42510.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 2250221 is about 1500.0736648578. The cubic root of 2250221 is about 131.0413598207.

Adding to 2250221 its reverse (1220522), we get a palindrome (3470743).

The spelling of 2250221 in words is "two million, two hundred fifty thousand, two hundred twenty-one".