73223561 has 2 divisors, whose sum is σ = 73223562. Its totient is φ = 73223560.

The previous prime is 73223551. The next prime is 73223567. The reversal of 73223561 is 16532237.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52475536 + 20748025 = 7244^2 + 4555^2 .

It is a cyclic number.

It is not a de Polignac number, because 73223561 - 2⁶ = 73223497 is a prime.

It is not a weakly prime, because it can be changed into another prime (73223567) 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, 36611780 + 36611781.

It is an arithmetic number, because the mean of its divisors is an integer number (36611781).

Almost surely, 2^73223561 is an apocalyptic number.

It is an amenable number.

73223561 is a deficient number, since it is larger than the sum of its proper divisors (1).

73223561 is an equidigital number, since it uses as much as digits as its factorization.

73223561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 29.

The square root of 73223561 is about 8557.0766620383. The cubic root of 73223561 is about 418.3601228680.

Adding to 73223561 its reverse (16532237), we get a palindrome (89755798).

The spelling of 73223561 in words is "seventy-three million, two hundred twenty-three thousand, five hundred sixty-one".