216617144 has 16 divisors (see below), whose sum is σ = 415603320. Its totient is φ = 105789600.

The previous prime is 216617041. The next prime is 216617147. The reversal of 216617144 is 441716612.

It is a self number, because there is not a number n which added to its sum of digits gives 216617144.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216617147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 314507 + ... + 315194.

Almost surely, 2^216617144 is an apocalyptic number.

It is an amenable number.

216617144 is a deficient number, since it is larger than the sum of its proper divisors (198986176).

216617144 is a wasteful number, since it uses less digits than its factorization.

216617144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629750 (or 629746 counting only the distinct ones).

The product of its digits is 8064, while the sum is 32.

The square root of 216617144 is about 14717.9191464011. The cubic root of 216617144 is about 600.5708862721.

The spelling of 216617144 in words is "two hundred sixteen million, six hundred seventeen thousand, one hundred forty-four".