7221443 has 4 divisors (see below), whose sum is σ = 7249800. Its totient is φ = 7193088.

The previous prime is 7221439. The next prime is 7221449. The reversal of 7221443 is 3441227.

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 7221443 - 2² = 7221439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7221449) 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, 13793 + ... + 14306.

It is an arithmetic number, because the mean of its divisors is an integer number (1812450).

Almost surely, 2^7221443 is an apocalyptic number.

7221443 is a deficient number, since it is larger than the sum of its proper divisors (28357).

7221443 is a wasteful number, since it uses less digits than its factorization.

7221443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28356.

The product of its digits is 1344, while the sum is 23.

The square root of 7221443 is about 2687.2742695899. The cubic root of 7221443 is about 193.2893812758.

It can be divided in two parts, 722 and 1443, that multiplied together give a triangular number (1041846 = T₁₄₄₃).

The spelling of 7221443 in words is "seven million, two hundred twenty-one thousand, four hundred forty-three".