73164521 has 4 divisors (see below), whose sum is σ = 73226052. Its totient is φ = 73102992.

The previous prime is 73164517. The next prime is 73164527. The reversal of 73164521 is 12546137.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1525225 + 71639296 = 1235^2 + 8464^2 .

It is a cyclic number.

It is not a de Polignac number, because 73164521 - 2² = 73164517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73164527) 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, 28946 + ... + 31371.

It is an arithmetic number, because the mean of its divisors is an integer number (18306513).

Almost surely, 2^73164521 is an apocalyptic number.

It is an amenable number.

73164521 is a deficient number, since it is larger than the sum of its proper divisors (61531).

73164521 is a wasteful number, since it uses less digits than its factorization.

73164521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61530.

The product of its digits is 5040, while the sum is 29.

The square root of 73164521 is about 8553.6261901021. The cubic root of 73164521 is about 418.2476516779.

The spelling of 73164521 in words is "seventy-three million, one hundred sixty-four thousand, five hundred twenty-one".