7222161601 has 2 divisors, whose sum is σ = 7222161602. Its totient is φ = 7222161600.

The previous prime is 7222161491. The next prime is 7222161641. The reversal of 7222161601 is 1061612227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6617985201 + 604176400 = 81351^2 + 24580^2 .

It is a cyclic number.

It is not a de Polignac number, because 7222161601 - 2¹³ = 7222153409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7222161601.

It is not a weakly prime, because it can be changed into another prime (7222161641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3611080800 + 3611080801.

It is an arithmetic number, because the mean of its divisors is an integer number (3611080801).

Almost surely, 2^7222161601 is an apocalyptic number.

It is an amenable number.

7222161601 is a deficient number, since it is larger than the sum of its proper divisors (1).

7222161601 is an equidigital number, since it uses as much as digits as its factorization.

7222161601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 7222161601 is about 84983.3018951370. The cubic root of 7222161601 is about 1932.9579242915.

Adding to 7222161601 its reverse (1061612227), we get a palindrome (8283773828).

The spelling of 7222161601 in words is "seven billion, two hundred twenty-two million, one hundred sixty-one thousand, six hundred one".