7222001 has 2 divisors, whose sum is σ = 7222002. Its totient is φ = 7222000.

The previous prime is 7221983. The next prime is 7222009. The reversal of 7222001 is 1002227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7182400 + 39601 = 2680^2 + 199^2 .

It is an emirp because it is prime and its reverse (1002227) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7222001 - 2⁶ = 7221937 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7222009) 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, 3611000 + 3611001.

It is an arithmetic number, because the mean of its divisors is an integer number (3611001).

Almost surely, 2^7222001 is an apocalyptic number.

It is an amenable number.

7222001 is a deficient number, since it is larger than the sum of its proper divisors (1).

7222001 is an equidigital number, since it uses as much as digits as its factorization.

7222001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56, while the sum is 14.

The square root of 7222001 is about 2687.3780902582. The cubic root of 7222001 is about 193.2943596297.

Adding to 7222001 its reverse (1002227), we get a palindrome (8224228).

The spelling of 7222001 in words is "seven million, two hundred twenty-two thousand, one".