2240221 has 4 divisors (see below), whose sum is σ = 2317500. Its totient is φ = 2162944.

The previous prime is 2240213. The next prime is 2240267. The reversal of 2240221 is 1220422.

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 376996 + 1863225 = 614^2 + 1365^2 .

It is a cyclic number.

It is not a de Polignac number, because 2240221 - 2³ = 2240213 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 (2240201) 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, 38596 + ... + 38653.

It is an arithmetic number, because the mean of its divisors is an integer number (579375).

2^2240221 is an apocalyptic number.

It is an amenable number.

2240221 is a deficient number, since it is larger than the sum of its proper divisors (77279).

2240221 is an equidigital number, since it uses as much as digits as its factorization.

2240221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77278.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 2240221 is about 1496.7367838067. The cubic root of 2240221 is about 130.8469552759.

Adding to 2240221 its reverse (1220422), we get a palindrome (3460643).

The spelling of 2240221 in words is "two million, two hundred forty thousand, two hundred twenty-one".