216236100 has 72 divisors (see below), whose sum is σ = 629765248. Its totient is φ = 57283200.

The previous prime is 216236099. The next prime is 216236113. The reversal of 216236100 is 1632612.

It is a happy number.

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, 44805 + ... + 49395.

Almost surely, 2^216236100 is an apocalyptic number.

216236100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216236100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (314882624).

216236100 is an abundant number, since it is smaller than the sum of its proper divisors (413529148).

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

216236100 is a wasteful number, since it uses less digits than its factorization.

216236100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4765 (or 4758 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 216236100 is about 14704.9685480793. The cubic root of 216236100 is about 600.2185315081.

Adding to 216236100 its reverse (1632612), we get a palindrome (217868712).

The spelling of 216236100 in words is "two hundred sixteen million, two hundred thirty-six thousand, one hundred".