7350221 has 2 divisors, whose sum is σ = 7350222. Its totient is φ = 7350220.

The previous prime is 7350209. The next prime is 7350257. The reversal of 7350221 is 1220537.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6817321 + 532900 = 2611^2 + 730^2 .

It is a cyclic number.

It is not a de Polignac number, because 7350221 - 2⁶ = 7350157 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 7350193 and 7350202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7350281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3675110 + 3675111.

It is an arithmetic number, because the mean of its divisors is an integer number (3675111).

Almost surely, 2^7350221 is an apocalyptic number.

It is an amenable number.

7350221 is a deficient number, since it is larger than the sum of its proper divisors (1).

7350221 is an equidigital number, since it uses as much as digits as its factorization.

7350221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 7350221 is about 2711.1291005778. The cubic root of 7350221 is about 194.4315771863.

Adding to 7350221 its reverse (1220537), we get a palindrome (8570758).

The spelling of 7350221 in words is "seven million, three hundred fifty thousand, two hundred twenty-one".