216426163 has 4 divisors (see below), whose sum is σ = 217006768. Its totient is φ = 215845560.

The previous prime is 216426157. The next prime is 216426187. The reversal of 216426163 is 361624612.

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-216426163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216426103) 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, 289743 + ... + 290488.

It is an arithmetic number, because the mean of its divisors is an integer number (54251692).

Almost surely, 2^216426163 is an apocalyptic number.

216426163 is a deficient number, since it is larger than the sum of its proper divisors (580605).

216426163 is an equidigital number, since it uses as much as digits as its factorization.

216426163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580604.

The product of its digits is 10368, while the sum is 31.

The square root of 216426163 is about 14711.4296721971. The cubic root of 216426163 is about 600.3943361453.

The spelling of 216426163 in words is "two hundred sixteen million, four hundred twenty-six thousand, one hundred sixty-three".