216143011 has 16 divisors (see below), whose sum is σ = 254382336. Its totient is φ = 179771616.

The previous prime is 216143009. The next prime is 216143017. The reversal of 216143011 is 110341612.

It is a cyclic number.

It is not a de Polignac number, because 216143011 - 2¹ = 216143009 is a prime.

It is a super-2 number, since 2×216143011² = 93435602408292242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 216143011.

It is not an unprimeable number, because it can be changed into a prime (216143017) 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, 120060 + ... + 121846.

It is an arithmetic number, because the mean of its divisors is an integer number (15898896).

Almost surely, 2^216143011 is an apocalyptic number.

216143011 is a deficient number, since it is larger than the sum of its proper divisors (38239325).

216143011 is a wasteful number, since it uses less digits than its factorization.

216143011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2298.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 216143011 is about 14701.8029846682. The cubic root of 216143011 is about 600.1323883793.

Adding to 216143011 its reverse (110341612), we get a palindrome (326484623).

The spelling of 216143011 in words is "two hundred sixteen million, one hundred forty-three thousand, eleven".