217723550264073 has 48 divisors (see below), whose sum is σ = 359767459823616. Its totient is φ = 124292040374880.

The previous prime is 217723550264063. The next prime is 217723550264093. The reversal of 217723550264073 is 370462055327712.

It is a happy number.

217723550264073 is a `hidden beast` number, since 2 + 1 + 7 + 7 + 2 + 3 + 5 + 502 + 64 + 0 + 73 = 666.

217723550264073 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 217723550264073 - 2⁴ = 217723550264057 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (217723550264053) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1078854808 + ... + 1079056598.

It is an arithmetic number, because the mean of its divisors is an integer number (7495155412992).

Almost surely, 2^{217723550264073} is an apocalyptic number.

It is an amenable number.

217723550264073 is a deficient number, since it is larger than the sum of its proper divisors (142043909559543).

217723550264073 is a wasteful number, since it uses less digits than its factorization.

217723550264073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218434 (or 218431 counting only the distinct ones).

The product of its (nonzero) digits is 14817600, while the sum is 54.

The spelling of 217723550264073 in words is "two hundred seventeen trillion, seven hundred twenty-three billion, five hundred fifty million, two hundred sixty-four thousand, seventy-three".