217107103 has 2 divisors, whose sum is σ = 217107104. Its totient is φ = 217107102.

The previous prime is 217107073. The next prime is 217107109. The reversal of 217107103 is 301701712.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-217107103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (217107109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108553551 + 108553552.

It is an arithmetic number, because the mean of its divisors is an integer number (108553552).

Almost surely, 2^217107103 is an apocalyptic number.

217107103 is a deficient number, since it is larger than the sum of its proper divisors (1).

217107103 is an equidigital number, since it uses as much as digits as its factorization.

217107103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 294, while the sum is 22.

The square root of 217107103 is about 14734.5547268996. The cubic root of 217107103 is about 601.0233489729.

Adding to 217107103 its reverse (301701712), we get a palindrome (518808815).

The spelling of 217107103 in words is "two hundred seventeen million, one hundred seven thousand, one hundred three".