216673563 has 8 divisors (see below), whose sum is σ = 292855888. Its totient is φ = 142470144.

The previous prime is 216673553. The next prime is 216673571. The reversal of 216673563 is 365376612.

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

It is not a de Polignac number, because 216673563 - 2⁵ = 216673531 is a prime.

It is a super-2 number, since 2×216673563² = 93894865806229938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216673553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 494470 + ... + 494907.

It is an arithmetic number, because the mean of its divisors is an integer number (36606986).

Almost surely, 2^216673563 is an apocalyptic number.

216673563 is a deficient number, since it is larger than the sum of its proper divisors (76182325).

216673563 is an equidigital number, since it uses as much as digits as its factorization.

216673563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989453.

The product of its digits is 136080, while the sum is 39.

The square root of 216673563 is about 14719.8356988113. The cubic root of 216673563 is about 600.6230222926.

The spelling of 216673563 in words is "two hundred sixteen million, six hundred seventy-three thousand, five hundred sixty-three".