216215700 has 144 divisors (see below), whose sum is σ = 657291264. Its totient is φ = 54806400.

The previous prime is 216215627. The next prime is 216215717. The reversal of 216215700 is 7512612.

216215700 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 622927 + ... + 623273.

Almost surely, 2^216215700 is an apocalyptic number.

216215700 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 216215700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (328645632).

216215700 is an abundant number, since it is smaller than the sum of its proper divisors (441075564).

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

216215700 is a wasteful number, since it uses less digits than its factorization.

216215700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462 (or 455 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 216215700 is about 14704.2748886166. The cubic root of 216215700 is about 600.1996557775.

The spelling of 216215700 in words is "two hundred sixteen million, two hundred fifteen thousand, seven hundred".