216968522371 has 4 divisors (see below), whose sum is σ = 216977830200. Its totient is φ = 216959214544.

The previous prime is 216968522363. The next prime is 216968522377. The reversal of 216968522371 is 173225869612.

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

It is a cyclic number.

It is not a de Polignac number, because 216968522371 - 2³ = 216968522363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216968522377) 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, 4618861 + ... + 4665598.

It is an arithmetic number, because the mean of its divisors is an integer number (54244457550).

Almost surely, 2^216968522371 is an apocalyptic number.

216968522371 is a deficient number, since it is larger than the sum of its proper divisors (9307829).

216968522371 is an equidigital number, since it uses as much as digits as its factorization.

216968522371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9307828.

The product of its digits is 2177280, while the sum is 52.

The spelling of 216968522371 in words is "two hundred sixteen billion, nine hundred sixty-eight million, five hundred twenty-two thousand, three hundred seventy-one".