216610003 has 2 divisors, whose sum is σ = 216610004. Its totient is φ = 216610002.

The previous prime is 216609959. The next prime is 216610103. The reversal of 216610003 is 300016612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216610003 - 2¹⁷ = 216478931 is a prime.

It is not a weakly prime, because it can be changed into another prime (216610103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108305001 + 108305002.

It is an arithmetic number, because the mean of its divisors is an integer number (108305002).

Almost surely, 2^216610003 is an apocalyptic number.

216610003 is a deficient number, since it is larger than the sum of its proper divisors (1).

216610003 is an equidigital number, since it uses as much as digits as its factorization.

216610003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 216610003 is about 14717.6765489666. The cubic root of 216610003 is about 600.5642867270.

Adding to 216610003 its reverse (300016612), we get a palindrome (516626615).

The spelling of 216610003 in words is "two hundred sixteen million, six hundred ten thousand, three".