216555246 has 48 divisors (see below), whose sum is σ = 480156768. Its totient is φ = 70516800.

The previous prime is 216555239. The next prime is 216555247. The reversal of 216555246 is 642555612.

216555246 is a `hidden beast` number, since 2 + 1 + 65 + 552 + 46 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 216555246.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216555247) 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, 182776 + ... + 183956.

It is an arithmetic number, because the mean of its divisors is an integer number (10003266).

Almost surely, 2^216555246 is an apocalyptic number.

216555246 is an abundant number, since it is smaller than the sum of its proper divisors (263601522).

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

216555246 is a wasteful number, since it uses less digits than its factorization.

216555246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1417 (or 1414 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The square root of 216555246 is about 14715.8161853157. The cubic root of 216555246 is about 600.5136767681.

The spelling of 216555246 in words is "two hundred sixteen million, five hundred fifty-five thousand, two hundred forty-six".