216463663 has 4 divisors (see below), whose sum is σ = 233114728. Its totient is φ = 199812600.

The previous prime is 216463661. The next prime is 216463673. The reversal of 216463663 is 366364612.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 216463663 - 2¹ = 216463661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216463661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8325513 + ... + 8325538.

It is an arithmetic number, because the mean of its divisors is an integer number (58278682).

Almost surely, 2^216463663 is an apocalyptic number.

216463663 is a deficient number, since it is larger than the sum of its proper divisors (16651065).

216463663 is a wasteful number, since it uses less digits than its factorization.

216463663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16651064.

The product of its digits is 93312, while the sum is 37.

The square root of 216463663 is about 14712.7041362219. The cubic root of 216463663 is about 600.4290107691.

The spelling of 216463663 in words is "two hundred sixteen million, four hundred sixty-three thousand, six hundred sixty-three".