216537842 has 8 divisors (see below), whose sum is σ = 325036800. Its totient is φ = 108192244.

The previous prime is 216537833. The next prime is 216537863. The reversal of 216537842 is 248735612.

It is a happy number.

216537842 is digitally balanced in base 2, 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 junction number, because it is equal to n+sod(n) for n = 216537796 and 216537805.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34742 + ... + 40497.

It is an arithmetic number, because the mean of its divisors is an integer number (40629600).

Almost surely, 2^216537842 is an apocalyptic number.

216537842 is a deficient number, since it is larger than the sum of its proper divisors (108498958).

216537842 is a wasteful number, since it uses less digits than its factorization.

216537842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76680.

The product of its digits is 80640, while the sum is 38.

The square root of 216537842 is about 14715.2248368824. The cubic root of 216537842 is about 600.4975890796.

The spelling of 216537842 in words is "two hundred sixteen million, five hundred thirty-seven thousand, eight hundred forty-two".