216533700 has 108 divisors (see below), whose sum is σ = 693288960. Its totient is φ = 56502720.

The previous prime is 216533687. The next prime is 216533701. The reversal of 216533700 is 7335612.

It is a happy number.

216533700 is a `hidden beast` number, since 2 + 1 + 653 + 3 + 7 + 0 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (216533701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 39741 + ... + 44859.

Almost surely, 2^216533700 is an apocalyptic number.

216533700 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 216533700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (346644480).

216533700 is an abundant number, since it is smaller than the sum of its proper divisors (476755260).

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

216533700 is a wasteful number, since it uses less digits than its factorization.

216533700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5186 (or 5176 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The square root of 216533700 is about 14715.0840976190. The cubic root of 216533700 is about 600.4937602233.

The spelling of 216533700 in words is "two hundred sixteen million, five hundred thirty-three thousand, seven hundred".