216533830 has 16 divisors (see below), whose sum is σ = 392738544. Its totient is φ = 85951840.

The previous prime is 216533827. The next prime is 216533873. The reversal of 216533830 is 38335612.

It is a junction number, because it is equal to n+sod(n) for n = 216533792 and 216533801.

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, 81337 + ... + 83956.

It is an arithmetic number, because the mean of its divisors is an integer number (24546159).

Almost surely, 2^216533830 is an apocalyptic number.

216533830 is a deficient number, since it is larger than the sum of its proper divisors (176204714).

216533830 is a wasteful number, since it uses less digits than its factorization.

216533830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165431.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 216533830 is about 14715.0885148544. The cubic root of 216533830 is about 600.4938803958.

The spelling of 216533830 in words is "two hundred sixteen million, five hundred thirty-three thousand, eight hundred thirty".