216951768 has 48 divisors (see below), whose sum is σ = 640996200. Its totient is φ = 65742720.

The previous prime is 216951731. The next prime is 216951797. The reversal of 216951768 is 867159612.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 136173 + ... + 137756.

Almost surely, 2^216951768 is an apocalyptic number.

It is an amenable number.

216951768 is an abundant number, since it is smaller than the sum of its proper divisors (424044432).

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

216951768 is a wasteful number, since it uses less digits than its factorization.

216951768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273952 (or 273945 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 216951768 is about 14729.2826709246. The cubic root of 216951768 is about 600.8799754411.

The spelling of 216951768 in words is "two hundred sixteen million, nine hundred fifty-one thousand, seven hundred sixty-eight".