217723550264093 has 2 divisors, whose sum is σ = 217723550264094. Its totient is φ = 217723550264092.

The previous prime is 217723550264063. The next prime is 217723550264107. The reversal of 217723550264093 is 390462055327712.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144261286417924 + 73462263846169 = 12010882^2 + 8571013^2 .

It is a cyclic number.

It is not a de Polignac number, because 217723550264093 - 2³² = 217719255296797 is a prime.

It is a super-2 number, since 2×217723550264093² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (217723550264053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108861775132046 + 108861775132047.

It is an arithmetic number, because the mean of its divisors is an integer number (108861775132047).

Almost surely, 2^{217723550264093} is an apocalyptic number.

It is an amenable number.

217723550264093 is a deficient number, since it is larger than the sum of its proper divisors (1).

217723550264093 is an equidigital number, since it uses as much as digits as its factorization.

217723550264093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19051200, while the sum is 56.

The spelling of 217723550264093 in words is "two hundred seventeen trillion, seven hundred twenty-three billion, five hundred fifty million, two hundred sixty-four thousand, ninety-three".