216551202163 has 4 divisors (see below), whose sum is σ = 216557200960. Its totient is φ = 216545203368.

The previous prime is 216551202137. The next prime is 216551202173. The reversal of 216551202163 is 361202155612.

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 216551202163 - 2²¹ = 216549105011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216551202113) 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, 2944920 + ... + 3017557.

It is an arithmetic number, because the mean of its divisors is an integer number (54139300240).

Almost surely, 2^216551202163 is an apocalyptic number.

216551202163 is a deficient number, since it is larger than the sum of its proper divisors (5998797).

216551202163 is an equidigital number, since it uses as much as digits as its factorization.

216551202163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5998796.

The product of its (nonzero) digits is 21600, while the sum is 34.

Adding to 216551202163 its reverse (361202155612), we get a palindrome (577753357775).

The spelling of 216551202163 in words is "two hundred sixteen billion, five hundred fifty-one million, two hundred two thousand, one hundred sixty-three".