7221373 has 2 divisors, whose sum is σ = 7221374. Its totient is φ = 7221372.

The previous prime is 7221367. The next prime is 7221391. The reversal of 7221373 is 3731227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6061444 + 1159929 = 2462^2 + 1077^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7221373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7221353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3610686 + 3610687.

It is an arithmetic number, because the mean of its divisors is an integer number (3610687).

Almost surely, 2^7221373 is an apocalyptic number.

It is an amenable number.

7221373 is a deficient number, since it is larger than the sum of its proper divisors (1).

7221373 is an equidigital number, since it uses as much as digits as its factorization.

7221373 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1764, while the sum is 25.

The square root of 7221373 is about 2687.2612452086. The cubic root of 7221373 is about 193.2887567330.

The spelling of 7221373 in words is "seven million, two hundred twenty-one thousand, three hundred seventy-three".