7224520561 has 2 divisors, whose sum is σ = 7224520562. Its totient is φ = 7224520560.

The previous prime is 7224520493. The next prime is 7224520573. The reversal of 7224520561 is 1650254227.

7224520561 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6524600625 + 699919936 = 80775^2 + 26456^2 .

It is a cyclic number.

It is not a de Polignac number, because 7224520561 - 2²⁷ = 7090302833 is a prime.

It is not a weakly prime, because it can be changed into another prime (7224527561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3612260280 + 3612260281.

It is an arithmetic number, because the mean of its divisors is an integer number (3612260281).

Almost surely, 2^7224520561 is an apocalyptic number.

It is an amenable number.

7224520561 is a deficient number, since it is larger than the sum of its proper divisors (1).

7224520561 is an equidigital number, since it uses as much as digits as its factorization.

7224520561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 7224520561 is about 84997.1797238002. The cubic root of 7224520561 is about 1933.1683540916.

Adding to 7224520561 its reverse (1650254227), we get a palindrome (8874774788).

The spelling of 7224520561 in words is "seven billion, two hundred twenty-four million, five hundred twenty thousand, five hundred sixty-one".