217015229 has 2 divisors, whose sum is σ = 217015230. Its totient is φ = 217015228.

The previous prime is 217015223. The next prime is 217015241. The reversal of 217015229 is 922510712.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199459129 + 17556100 = 14123^2 + 4190^2 .

It is a cyclic number.

It is not a de Polignac number, because 217015229 - 2²⁴ = 200238013 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 (217015223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108507614 + 108507615.

It is an arithmetic number, because the mean of its divisors is an integer number (108507615).

Almost surely, 2^217015229 is an apocalyptic number.

It is an amenable number.

217015229 is a deficient number, since it is larger than the sum of its proper divisors (1).

217015229 is an equidigital number, since it uses as much as digits as its factorization.

217015229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 217015229 is about 14731.4367595289. The cubic root of 217015229 is about 600.9385579347.

The spelling of 217015229 in words is "two hundred seventeen million, fifteen thousand, two hundred twenty-nine".