7221353 has 2 divisors, whose sum is σ = 7221354. Its totient is φ = 7221352.

The previous prime is 7221307. The next prime is 7221367. The reversal of 7221353 is 3531227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5513104 + 1708249 = 2348^2 + 1307^2 .

It is a cyclic number.

It is not a de Polignac number, because 7221353 - 2¹⁸ = 6959209 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7221373) 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 as a sum of consecutive naturals, namely, 3610676 + 3610677.

It is an arithmetic number, because the mean of its divisors is an integer number (3610677).

Almost surely, 2^7221353 is an apocalyptic number.

It is an amenable number.

7221353 is a deficient number, since it is larger than the sum of its proper divisors (1).

7221353 is an equidigital number, since it uses as much as digits as its factorization.

7221353 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1260, while the sum is 23.

The square root of 7221353 is about 2687.2575239452. The cubic root of 7221353 is about 193.2885782915.

The spelling of 7221353 in words is "seven million, two hundred twenty-one thousand, three hundred fifty-three".