216143165 has 16 divisors (see below), whose sum is σ = 302476800. Its totient is φ = 148211280.

The previous prime is 216143143. The next prime is 216143173. The reversal of 216143165 is 561341612.

It is a happy number.

216143165 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 216143165 - 2⁶ = 216143101 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61301 + ... + 64730.

It is an arithmetic number, because the mean of its divisors is an integer number (18904800).

Almost surely, 2^216143165 is an apocalyptic number.

It is an amenable number.

216143165 is a deficient number, since it is larger than the sum of its proper divisors (86333635).

216143165 is an equidigital number, since it uses as much as digits as its factorization.

216143165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126057 (or 126043 counting only the distinct ones).

The product of its digits is 4320, while the sum is 29.

The square root of 216143165 is about 14701.8082221202. The cubic root of 216143165 is about 600.1325309090.

Adding to 216143165 its reverse (561341612), we get a palindrome (777484777).

The spelling of 216143165 in words is "two hundred sixteen million, one hundred forty-three thousand, one hundred sixty-five".