216263 has 2 divisors, whose sum is σ = 216264. Its totient is φ = 216262.

The previous prime is 216259. The next prime is 216289. The reversal of 216263 is 362612.

216263 is nontrivially palindromic in base 4.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216263 - 2² = 216259 is a prime.

It is a Sophie Germain prime.

It is equal to p₁₉₃₀₇ and since 216263 and 19307 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108131 + 108132.

It is an arithmetic number, because the mean of its divisors is an integer number (108132).

2²¹⁶²⁶³ is an apocalyptic number.

216263 is a deficient number, since it is larger than the sum of its proper divisors (1).

216263 is an equidigital number, since it uses as much as digits as its factorization.

216263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 20.

The square root of 216263 is about 465.0408584200. The cubic root of 216263 is about 60.0243419750.

Adding to 216263 its reverse (362612), we get a palindrome (578875).

The spelling of 216263 in words is "two hundred sixteen thousand, two hundred sixty-three".