73224551 has 4 divisors (see below), whose sum is σ = 73253232. Its totient is φ = 73195872.

The previous prime is 73224533. The next prime is 73224577. The reversal of 73224551 is 15542237.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15542237 = 353 ⋅44029.

It is a cyclic number.

It is not a de Polignac number, because 73224551 - 2¹⁴ = 73208167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73224521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10091 + ... + 15756.

It is an arithmetic number, because the mean of its divisors is an integer number (18313308).

Almost surely, 2^73224551 is an apocalyptic number.

73224551 is a deficient number, since it is larger than the sum of its proper divisors (28681).

73224551 is a wasteful number, since it uses less digits than its factorization.

73224551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28680.

The product of its digits is 8400, while the sum is 29.

The square root of 73224551 is about 8557.1345087009. The cubic root of 73224551 is about 418.3620083023.

Adding to 73224551 its reverse (15542237), we get a palindrome (88766788).

The spelling of 73224551 in words is "seventy-three million, two hundred twenty-four thousand, five hundred fifty-one".