216243163 has 2 divisors, whose sum is σ = 216243164. Its totient is φ = 216243162.

The previous prime is 216243149. The next prime is 216243187. The reversal of 216243163 is 361342612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216243163 - 2¹³ = 216234971 is a prime.

It is a super-2 number, since 2×216243163² = 93522211088489138, which contains 22 as substring.

It is equal to p_11927107 and since 216243163 and 11927107 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (216243563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108121581 + 108121582.

It is an arithmetic number, because the mean of its divisors is an integer number (108121582).

Almost surely, 2^216243163 is an apocalyptic number.

216243163 is a deficient number, since it is larger than the sum of its proper divisors (1).

216243163 is an equidigital number, since it uses as much as digits as its factorization.

216243163 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 28.

The square root of 216243163 is about 14705.2087030412. The cubic root of 216243163 is about 600.2250664905.

Adding to 216243163 its reverse (361342612), we get a palindrome (577585775).

The spelling of 216243163 in words is "two hundred sixteen million, two hundred forty-three thousand, one hundred sixty-three".