216161782 has 8 divisors (see below), whose sum is σ = 324388656. Its totient is φ = 108032232.

The previous prime is 216161713. The next prime is 216161801. The reversal of 216161782 is 287161612.

216161782 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 18498 + ... + 27829.

It is an arithmetic number, because the mean of its divisors is an integer number (40548582).

Almost surely, 2^216161782 is an apocalyptic number.

216161782 is a deficient number, since it is larger than the sum of its proper divisors (108226874).

216161782 is a wasteful number, since it uses less digits than its factorization.

216161782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48662.

The product of its digits is 8064, while the sum is 34.

The square root of 216161782 is about 14702.4413618963. The cubic root of 216161782 is about 600.1497607646.

The spelling of 216161782 in words is "two hundred sixteen million, one hundred sixty-one thousand, seven hundred eighty-two".