7324221 has 4 divisors (see below), whose sum is σ = 9765632. Its totient is φ = 4882812.

The previous prime is 7324171. The next prime is 7324223. The reversal of 7324221 is 1224237.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 7324221 - 2¹¹ = 7322173 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 (7324223) 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, 1220701 + ... + 1220706.

It is an arithmetic number, because the mean of its divisors is an integer number (2441408).

Almost surely, 2^7324221 is an apocalyptic number.

It is an amenable number.

7324221 is a deficient number, since it is larger than the sum of its proper divisors (2441411).

7324221 is a wasteful number, since it uses less digits than its factorization.

7324221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2441410.

The product of its digits is 672, while the sum is 21.

The square root of 7324221 is about 2706.3298025185. The cubic root of 7324221 is about 194.2020515084.

Adding to 7324221 its reverse (1224237), we get a palindrome (8548458).

The spelling of 7324221 in words is "seven million, three hundred twenty-four thousand, two hundred twenty-one".