216239963 has 2 divisors, whose sum is σ = 216239964. Its totient is φ = 216239962.

The previous prime is 216239957. The next prime is 216239981. The reversal of 216239963 is 369932612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216239963 - 2⁶ = 216239899 is a prime.

It is a super-3 number, since 3×216239963³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 216239963.

It is not a weakly prime, because it can be changed into another prime (216239953) 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, 108119981 + 108119982.

It is an arithmetic number, because the mean of its divisors is an integer number (108119982).

Almost surely, 2^216239963 is an apocalyptic number.

216239963 is a deficient number, since it is larger than the sum of its proper divisors (1).

216239963 is an equidigital number, since it uses as much as digits as its factorization.

216239963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976, while the sum is 41.

The square root of 216239963 is about 14705.0998976546. The cubic root of 216239963 is about 600.2221057346. Note that the first 3 decimals are identical.

The spelling of 216239963 in words is "two hundred sixteen million, two hundred thirty-nine thousand, nine hundred sixty-three".