73224545 has 4 divisors (see below), whose sum is σ = 87869460. Its totient is φ = 58579632.

The previous prime is 73224533. The next prime is 73224577. The reversal of 73224545 is 54542237.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54542237 = 31 ⋅1759427.

It can be written as a sum of positive squares in 2 ways, for example, as 14992384 + 58232161 = 3872^2 + 7631^2 .

It is a cyclic number.

It is not a de Polignac number, because 73224545 - 2⁸ = 73224289 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7322450 + ... + 7322459.

It is an arithmetic number, because the mean of its divisors is an integer number (21967365).

Almost surely, 2^73224545 is an apocalyptic number.

It is an amenable number.

73224545 is a deficient number, since it is larger than the sum of its proper divisors (14644915).

73224545 is a wasteful number, since it uses less digits than its factorization.

73224545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14644914.

The product of its digits is 33600, while the sum is 32.

The square root of 73224545 is about 8557.1341581163. The cubic root of 73224545 is about 418.3619968755.

The spelling of 73224545 in words is "seventy-three million, two hundred twenty-four thousand, five hundred forty-five".