73445215 has 4 divisors (see below), whose sum is σ = 88134264. Its totient is φ = 58756168.

The previous prime is 73445191. The next prime is 73445249. The reversal of 73445215 is 51254437.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 73445215 - 2⁷ = 73445087 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 7344517 + ... + 7344526.

It is an arithmetic number, because the mean of its divisors is an integer number (22033566).

Almost surely, 2^73445215 is an apocalyptic number.

73445215 is a deficient number, since it is larger than the sum of its proper divisors (14689049).

73445215 is a wasteful number, since it uses less digits than its factorization.

73445215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14689048.

The product of its digits is 16800, while the sum is 31.

The square root of 73445215 is about 8570.0183780433. The cubic root of 73445215 is about 418.7818349600.

The spelling of 73445215 in words is "seventy-three million, four hundred forty-five thousand, two hundred fifteen".