7221323 has 4 divisors (see below), whose sum is σ = 7288920. Its totient is φ = 7153728.

The previous prime is 7221307. The next prime is 7221353. The reversal of 7221323 is 3231227.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7221323 - 2⁴ = 7221307 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7221295 and 7221304.

It is not an unprimeable number, because it can be changed into a prime (7221353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33638 + ... + 33851.

It is an arithmetic number, because the mean of its divisors is an integer number (1822230).

Almost surely, 2^7221323 is an apocalyptic number.

7221323 is a deficient number, since it is larger than the sum of its proper divisors (67597).

7221323 is a wasteful number, since it uses less digits than its factorization.

7221323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67596.

The product of its digits is 504, while the sum is 20.

The square root of 7221323 is about 2687.2519420404. The cubic root of 7221323 is about 193.2883106285.

The spelling of 7221323 in words is "seven million, two hundred twenty-one thousand, three hundred twenty-three".