168522217 has 2 divisors, whose sum is σ = 168522218. Its totient is φ = 168522216.

The previous prime is 168522197. The next prime is 168522253. The reversal of 168522217 is 712225861.

It is a happy number.

168522217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142348761 + 26173456 = 11931^2 + 5116^2 .

It is a cyclic number.

It is not a de Polignac number, because 168522217 - 2¹¹ = 168520169 is a prime.

It is not a weakly prime, because it can be changed into another prime (168522257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84261108 + 84261109.

It is an arithmetic number, because the mean of its divisors is an integer number (84261109).

Almost surely, 2^168522217 is an apocalyptic number.

It is an amenable number.

168522217 is a deficient number, since it is larger than the sum of its proper divisors (1).

168522217 is an equidigital number, since it uses as much as digits as its factorization.

168522217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 34.

The square root of 168522217 is about 12981.6107244055. The cubic root of 168522217 is about 552.3559729136.

The spelling of 168522217 in words is "one hundred sixty-eight million, five hundred twenty-two thousand, two hundred seventeen".