2216685386887 has 4 divisors (see below), whose sum is σ = 2220940061856. Its totient is φ = 2212430711920.

The previous prime is 2216685386873. The next prime is 2216685386921. The reversal of 2216685386887 is 7886835866122.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2216685386887 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 (2216685386087) 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, 2127336703 + ... + 2127337744.

It is an arithmetic number, because the mean of its divisors is an integer number (555235015464).

Almost surely, 2^{2216685386887} is an apocalyptic number.

2216685386887 is a deficient number, since it is larger than the sum of its proper divisors (4254674969).

2216685386887 is an equidigital number, since it uses as much as digits as its factorization.

2216685386887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4254674968.

The product of its digits is 371589120, while the sum is 70.

The spelling of 2216685386887 in words is "two trillion, two hundred sixteen billion, six hundred eighty-five million, three hundred eighty-six thousand, eight hundred eighty-seven".