216565244 has 24 divisors (see below), whose sum is σ = 458609760. Its totient is φ = 87353856.

The previous prime is 216565241. The next prime is 216565259. The reversal of 216565244 is 442565612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216565241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 227009 + ... + 227960.

It is an arithmetic number, because the mean of its divisors is an integer number (19108740).

Almost surely, 2^216565244 is an apocalyptic number.

It is an amenable number.

216565244 is an abundant number, since it is smaller than the sum of its proper divisors (242044516).

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

216565244 is a wasteful number, since it uses less digits than its factorization.

216565244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454997 (or 454995 counting only the distinct ones).

The product of its digits is 57600, while the sum is 35.

The square root of 216565244 is about 14716.1558839257. The cubic root of 216565244 is about 600.5229182026.

The spelling of 216565244 in words is "two hundred sixteen million, five hundred sixty-five thousand, two hundred forty-four".