216424116 has 24 divisors (see below), whose sum is σ = 561099840. Its totient is φ = 72141336.

The previous prime is 216424099. The next prime is 216424133. The reversal of 216424116 is 611424612.

216424116 is a `hidden beast` number, since 2 + 1 + 642 + 4 + 1 + 16 = 666.

It is an interprime number because it is at equal distance from previous prime (216424099) and next prime (216424133).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 216424116.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1001856 + ... + 1002071.

It is an arithmetic number, because the mean of its divisors is an integer number (23379160).

Almost surely, 2^216424116 is an apocalyptic number.

It is an amenable number.

216424116 is an abundant number, since it is smaller than the sum of its proper divisors (344675724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216424116 is a wasteful number, since it uses less digits than its factorization.

216424116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2003940 (or 2003932 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 216424116 is about 14711.3601002762. The cubic root of 216424116 is about 600.3924432579.

Adding to 216424116 its reverse (611424612), we get a palindrome (827848728).

The spelling of 216424116 in words is "two hundred sixteen million, four hundred twenty-four thousand, one hundred sixteen".