73215545 has 32 divisors (see below), whose sum is σ = 98388864. Its totient is φ = 51955200.

The previous prime is 73215533. The next prime is 73215547. The reversal of 73215545 is 54551237.

It is not a de Polignac number, because 73215545 - 2⁴ = 73215529 is a prime.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (73215547) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 221030 + ... + 221360.

It is an arithmetic number, because the mean of its divisors is an integer number (3074652).

Almost surely, 2^73215545 is an apocalyptic number.

It is an amenable number.

73215545 is a deficient number, since it is larger than the sum of its proper divisors (25173319).

73215545 is a wasteful number, since it uses less digits than its factorization.

73215545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473.

The product of its digits is 21000, while the sum is 32.

The square root of 73215545 is about 8556.6082649611. The cubic root of 73215545 is about 418.3448559371.

The spelling of 73215545 in words is "seventy-three million, two hundred fifteen thousand, five hundred forty-five".