217416061 has 2 divisors, whose sum is σ = 217416062. Its totient is φ = 217416060.

The previous prime is 217416047. The next prime is 217416097. The reversal of 217416061 is 160614712.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112763161 + 104652900 = 10619^2 + 10230^2 .

It is a cyclic number.

It is not a de Polignac number, because 217416061 - 2⁵ = 217416029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (217416011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108708030 + 108708031.

It is an arithmetic number, because the mean of its divisors is an integer number (108708031).

Almost surely, 2^217416061 is an apocalyptic number.

It is an amenable number.

217416061 is a deficient number, since it is larger than the sum of its proper divisors (1).

217416061 is an equidigital number, since it uses as much as digits as its factorization.

217416061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 217416061 is about 14745.0351305109. The cubic root of 217416061 is about 601.3083127155.

The spelling of 217416061 in words is "two hundred seventeen million, four hundred sixteen thousand, sixty-one".