217006061 has 2 divisors, whose sum is σ = 217006062. Its totient is φ = 217006060.

The previous prime is 217006051. The next prime is 217006067. The reversal of 217006061 is 160600712.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120868036 + 96138025 = 10994^2 + 9805^2 .

It is a cyclic number.

It is not a de Polignac number, because 217006061 - 2²² = 212811757 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (217006067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108503030 + 108503031.

It is an arithmetic number, because the mean of its divisors is an integer number (108503031).

Almost surely, 2^217006061 is an apocalyptic number.

It is an amenable number.

217006061 is a deficient number, since it is larger than the sum of its proper divisors (1).

217006061 is an equidigital number, since it uses as much as digits as its factorization.

217006061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 217006061 is about 14731.1255849646. The cubic root of 217006061 is about 600.9300954221.

Adding to 217006061 its reverse (160600712), we get a palindrome (377606773).

The spelling of 217006061 in words is "two hundred seventeen million, six thousand, sixty-one".