216512203 has 2 divisors, whose sum is σ = 216512204. Its totient is φ = 216512202.

The previous prime is 216512189. The next prime is 216512207. The reversal of 216512203 is 302215612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216512203 - 2⁵ = 216512171 is a prime.

It is not a weakly prime, because it can be changed into another prime (216512207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108256101 + 108256102.

It is an arithmetic number, because the mean of its divisors is an integer number (108256102).

Almost surely, 2^216512203 is an apocalyptic number.

216512203 is a deficient number, since it is larger than the sum of its proper divisors (1).

216512203 is an equidigital number, since it uses as much as digits as its factorization.

216512203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 216512203 is about 14714.3536385395. The cubic root of 216512203 is about 600.4738876560.

Adding to 216512203 its reverse (302215612), we get a palindrome (518727815).

The spelling of 216512203 in words is "two hundred sixteen million, five hundred twelve thousand, two hundred three".