217035149 has 2 divisors, whose sum is σ = 217035150. Its totient is φ = 217035148.

The previous prime is 217035113. The next prime is 217035187. The reversal of 217035149 is 941530712.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163379524 + 53655625 = 12782^2 + 7325^2 .

It is a cyclic number.

It is not a de Polignac number, because 217035149 - 2⁸ = 217034893 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 (217035349) 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, 108517574 + 108517575.

It is an arithmetic number, because the mean of its divisors is an integer number (108517575).

Almost surely, 2^217035149 is an apocalyptic number.

It is an amenable number.

217035149 is a deficient number, since it is larger than the sum of its proper divisors (1).

217035149 is an equidigital number, since it uses as much as digits as its factorization.

217035149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 217035149 is about 14732.1128491469. The cubic root of 217035149 is about 600.9569442477.

The spelling of 217035149 in words is "two hundred seventeen million, thirty-five thousand, one hundred forty-nine".