216401163 has 16 divisors (see below), whose sum is σ = 315415296. Its totient is φ = 130881440.

The previous prime is 216401153. The next prime is 216401189. The reversal of 216401163 is 361104612.

It is a cyclic number.

It is not a de Polignac number, because 216401163 - 2⁴ = 216401147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216401153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10081 + ... + 23117.

It is an arithmetic number, because the mean of its divisors is an integer number (19713456).

Almost surely, 2^216401163 is an apocalyptic number.

216401163 is a deficient number, since it is larger than the sum of its proper divisors (99014133).

216401163 is a wasteful number, since it uses less digits than its factorization.

216401163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13554.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 216401163 is about 14710.5799681726. The cubic root of 216401163 is about 600.3712175041.

Adding to 216401163 its reverse (361104612), we get a palindrome (577505775).

The spelling of 216401163 in words is "two hundred sixteen million, four hundred one thousand, one hundred sixty-three".