217168223 has 2 divisors, whose sum is σ = 217168224. Its totient is φ = 217168222.

The previous prime is 217168201. The next prime is 217168249. The reversal of 217168223 is 322861712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 217168223 - 2¹⁶ = 217102687 is a prime.

It is equal to p_11975162 and since 217168223 and 11975162 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 217168223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (217168253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108584111 + 108584112.

It is an arithmetic number, because the mean of its divisors is an integer number (108584112).

Almost surely, 2^217168223 is an apocalyptic number.

217168223 is a deficient number, since it is larger than the sum of its proper divisors (1).

217168223 is an equidigital number, since it uses as much as digits as its factorization.

217168223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 32.

The square root of 217168223 is about 14736.6286171566. The cubic root of 217168223 is about 601.0797437199.

The spelling of 217168223 in words is "two hundred seventeen million, one hundred sixty-eight thousand, two hundred twenty-three".