216887005 has 8 divisors (see below), whose sum is σ = 268660224. Its totient is φ = 167912400.

The previous prime is 216886993. The next prime is 216887023. The reversal of 216887005 is 500788612.

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

It is not a de Polignac number, because 216887005 - 2⁷ = 216886877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 699481 + ... + 699790.

It is an arithmetic number, because the mean of its divisors is an integer number (33582528).

Almost surely, 2^216887005 is an apocalyptic number.

It is an amenable number.

216887005 is a deficient number, since it is larger than the sum of its proper divisors (51773219).

216887005 is a wasteful number, since it uses less digits than its factorization.

216887005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1399307.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 216887005 is about 14727.0840630452. The cubic root of 216887005 is about 600.8201792584.

The spelling of 216887005 in words is "two hundred sixteen million, eight hundred eighty-seven thousand, five".