216563907 has 8 divisors (see below), whose sum is σ = 330002176. Its totient is φ = 123750792.

The previous prime is 216563857. The next prime is 216563911. The reversal of 216563907 is 709365612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 216563907 - 2²³ = 208175299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216563407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5156263 + ... + 5156304.

It is an arithmetic number, because the mean of its divisors is an integer number (41250272).

Almost surely, 2^216563907 is an apocalyptic number.

216563907 is a deficient number, since it is larger than the sum of its proper divisors (113438269).

216563907 is a wasteful number, since it uses less digits than its factorization.

216563907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10312577.

The product of its (nonzero) digits is 68040, while the sum is 39.

The square root of 216563907 is about 14716.1104575903. The cubic root of 216563907 is about 600.5216823921.

It can be divided in two parts, 216563 and 907, that added together give a triangular number (217470 = T₆₅₉).

The spelling of 216563907 in words is "two hundred sixteen million, five hundred sixty-three thousand, nine hundred seven".