216662563 has 12 divisors (see below), whose sum is σ = 235704000. Its totient is φ = 199064736.

The previous prime is 216662561. The next prime is 216662581. The reversal of 216662563 is 365266612.

It is not a de Polignac number, because 216662563 - 2¹ = 216662561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216662561) 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 11 ways as a sum of consecutive naturals, for example, 34813 + ... + 40561.

It is an arithmetic number, because the mean of its divisors is an integer number (19642000).

Almost surely, 2^216662563 is an apocalyptic number.

216662563 is a deficient number, since it is larger than the sum of its proper divisors (19041437).

216662563 is a wasteful number, since it uses less digits than its factorization.

216662563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5998 (or 5985 counting only the distinct ones).

The product of its digits is 77760, while the sum is 37.

The square root of 216662563 is about 14719.4620485940. The cubic root of 216662563 is about 600.6128580545.

The spelling of 216662563 in words is "two hundred sixteen million, six hundred sixty-two thousand, five hundred sixty-three".