217035047 has 2 divisors, whose sum is σ = 217035048. Its totient is φ = 217035046.

The previous prime is 217035031. The next prime is 217035083. The reversal of 217035047 is 740530712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 217035047 - 2⁴ = 217035031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (217035547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108517523 + 108517524.

It is an arithmetic number, because the mean of its divisors is an integer number (108517524).

Almost surely, 2^217035047 is an apocalyptic number.

217035047 is a deficient number, since it is larger than the sum of its proper divisors (1).

217035047 is an equidigital number, since it uses as much as digits as its factorization.

217035047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 217035047 is about 14732.1093873213. The cubic root of 217035047 is about 600.9568501038.

Adding to 217035047 its reverse (740530712), we get a palindrome (957565759).

The spelling of 217035047 in words is "two hundred seventeen million, thirty-five thousand, forty-seven".