2243521 has 8 divisors (see below), whose sum is σ = 2597120. Its totient is φ = 1898208.

The previous prime is 2243503. The next prime is 2243531. The reversal of 2243521 is 1253422.

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

It is a cyclic number.

It is not a de Polignac number, because 2243521 - 2⁷ = 2243393 is a prime.

It is a d-powerful number, because it can be written as 2³ + 2⁹ + 4⁸ + 3⁷ + 5⁷ + 2²¹ + 1 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2243531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1476 + ... + 2581.

It is an arithmetic number, because the mean of its divisors is an integer number (324640).

2^2243521 is an apocalyptic number.

It is an amenable number.

2243521 is a deficient number, since it is larger than the sum of its proper divisors (353599).

2243521 is an equidigital number, since it uses as much as digits as its factorization.

2243521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4143.

The product of its digits is 480, while the sum is 19.

The square root of 2243521 is about 1497.8387763708. The cubic root of 2243521 is about 130.9111726164.

Adding to 2243521 its reverse (1253422), we get a palindrome (3496943).

Subtracting from 2243521 its reverse (1253422), we obtain a palindrome (990099).

The spelling of 2243521 in words is "two million, two hundred forty-three thousand, five hundred twenty-one".