216230220 has 72 divisors (see below), whose sum is σ = 673646064. Its totient is φ = 56101248.

The previous prime is 216230219. The next prime is 216230243. The reversal of 216230220 is 22032612.

216230220 is a `hidden beast` number, since 21 + 623 + 0 + 2 + 20 = 666.

216230220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 216230193 and 216230202.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9574 + ... + 22893.

Almost surely, 2^216230220 is an apocalyptic number.

216230220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216230220 is an abundant number, since it is smaller than the sum of its proper divisors (457415844).

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

216230220 is a wasteful number, since it uses less digits than its factorization.

216230220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32519 (or 32514 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 216230220 is about 14704.7686142965. The cubic root of 216230220 is about 600.2130909781.

Adding to 216230220 its reverse (22032612), we get a palindrome (238262832).

The spelling of 216230220 in words is "two hundred sixteen million, two hundred thirty thousand, two hundred twenty".