216819630 has 48 divisors (see below), whose sum is σ = 578975904. Its totient is φ = 56255040.

The previous prime is 216819623. The next prime is 216819637. The reversal of 216819630 is 36918612.

216819630 is a `hidden beast` number, since 2 + 1 + 6 + 8 + 19 + 630 = 666.

It is an interprime number because it is at equal distance from previous prime (216819623) and next prime (216819637).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216819637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29226 + ... + 35885.

It is an arithmetic number, because the mean of its divisors is an integer number (12061998).

Almost surely, 2^216819630 is an apocalyptic number.

216819630 is an abundant number, since it is smaller than the sum of its proper divisors (362156274).

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

216819630 is a wasteful number, since it uses less digits than its factorization.

216819630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65161 (or 65158 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 216819630 is about 14724.7964332279. The cubic root of 216819630 is about 600.7579587610.

The spelling of 216819630 in words is "two hundred sixteen million, eight hundred nineteen thousand, six hundred thirty".