217030103 has 4 divisors (see below), whose sum is σ = 228452760. Its totient is φ = 205607448.

The previous prime is 217030091. The next prime is 217030111. The reversal of 217030103 is 301030712.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 217030103 - 2⁸ = 217029847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217230103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5711300 + ... + 5711337.

It is an arithmetic number, because the mean of its divisors is an integer number (57113190).

Almost surely, 2^217030103 is an apocalyptic number.

217030103 is a deficient number, since it is larger than the sum of its proper divisors (11422657).

217030103 is a wasteful number, since it uses less digits than its factorization.

217030103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11422656.

The product of its (nonzero) digits is 126, while the sum is 17.

The square root of 217030103 is about 14731.9415896208. The cubic root of 217030103 is about 600.9522868574.

Adding to 217030103 its reverse (301030712), we get a palindrome (518060815).

The spelling of 217030103 in words is "two hundred seventeen million, thirty thousand, one hundred three".