216612203 has 2 divisors, whose sum is σ = 216612204. Its totient is φ = 216612202.

The previous prime is 216612173. The next prime is 216612251. The reversal of 216612203 is 302216612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216612203 - 2⁸ = 216611947 is a prime.

It is not a weakly prime, because it can be changed into another prime (216662203) 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, 108306101 + 108306102.

It is an arithmetic number, because the mean of its divisors is an integer number (108306102).

Almost surely, 2^216612203 is an apocalyptic number.

216612203 is a deficient number, since it is larger than the sum of its proper divisors (1).

216612203 is an equidigital number, since it uses as much as digits as its factorization.

216612203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 216612203 is about 14717.7512888349. The cubic root of 216612203 is about 600.5663199310.

Adding to 216612203 its reverse (302216612), we get a palindrome (518828815).

The spelling of 216612203 in words is "two hundred sixteen million, six hundred twelve thousand, two hundred three".