216404573 has 16 divisors (see below), whose sum is σ = 273836544. Its totient is φ = 166106160.

The previous prime is 216404569. The next prime is 216404599. The reversal of 216404573 is 375404612.

216404573 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 216404573 - 2² = 216404569 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 (216404473) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15815 + ... + 26132.

It is an arithmetic number, because the mean of its divisors is an integer number (17114784).

Almost surely, 2^216404573 is an apocalyptic number.

It is an amenable number.

216404573 is a deficient number, since it is larger than the sum of its proper divisors (57431971).

216404573 is a wasteful number, since it uses less digits than its factorization.

216404573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42032.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 216404573 is about 14710.6958706922. The cubic root of 216404573 is about 600.3743709916.

The spelling of 216404573 in words is "two hundred sixteen million, four hundred four thousand, five hundred seventy-three".