7241222561 has 2 divisors, whose sum is σ = 7241222562. Its totient is φ = 7241222560.

The previous prime is 7241222551. The next prime is 7241222579. The reversal of 7241222561 is 1652221427.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6879043600 + 362178961 = 82940^2 + 19031^2 .

It is a cyclic number.

It is not a de Polignac number, because 7241222561 - 2⁶ = 7241222497 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (7241222531) 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, 3620611280 + 3620611281.

It is an arithmetic number, because the mean of its divisors is an integer number (3620611281).

Almost surely, 2^7241222561 is an apocalyptic number.

It is an amenable number.

7241222561 is a deficient number, since it is larger than the sum of its proper divisors (1).

7241222561 is an equidigital number, since it uses as much as digits as its factorization.

7241222561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13440, while the sum is 32.

The square root of 7241222561 is about 85095.3733231132. The cubic root of 7241222561 is about 1934.6569386049.

Adding to 7241222561 its reverse (1652221427), we get a palindrome (8893443988).

The spelling of 7241222561 in words is "seven billion, two hundred forty-one million, two hundred twenty-two thousand, five hundred sixty-one".