73224561 has 4 divisors (see below), whose sum is σ = 97632752. Its totient is φ = 48816372.

The previous prime is 73224533. The next prime is 73224577. The reversal of 73224561 is 16542237.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16542237 = 3 ⋅5514079.

It is not a de Polignac number, because 73224561 - 2¹⁰ = 73223537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73224521) 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 in 3 ways as a sum of consecutive naturals, for example, 12204091 + ... + 12204096.

It is an arithmetic number, because the mean of its divisors is an integer number (24408188).

Almost surely, 2^73224561 is an apocalyptic number.

It is an amenable number.

73224561 is a deficient number, since it is larger than the sum of its proper divisors (24408191).

73224561 is a wasteful number, since it uses less digits than its factorization.

73224561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24408190.

The product of its digits is 10080, while the sum is 30.

The square root of 73224561 is about 8557.1350930086. The cubic root of 73224561 is about 418.3620273470.

Adding to 73224561 its reverse (16542237), we get a palindrome (89766798).

The spelling of 73224561 in words is "seventy-three million, two hundred twenty-four thousand, five hundred sixty-one".