216180842 has 8 divisors (see below), whose sum is σ = 325128000. Its totient is φ = 107804844.

The previous prime is 216180827. The next prime is 216180847. The reversal of 216180842 is 248081612.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 216180799 and 216180808.

It is not an unprimeable number, because it can be changed into a prime (216180847) 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, 141842 + ... + 143357.

It is an arithmetic number, because the mean of its divisors is an integer number (40641000).

Almost surely, 2^216180842 is an apocalyptic number.

216180842 is a deficient number, since it is larger than the sum of its proper divisors (108947158).

216180842 is a wasteful number, since it uses less digits than its factorization.

216180842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285580.

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 216180842 is about 14703.0895392771. The cubic root of 216180842 is about 600.1673995876.

The spelling of 216180842 in words is "two hundred sixteen million, one hundred eighty thousand, eight hundred forty-two".