216033881 has 8 divisors (see below), whose sum is σ = 247740864. Its totient is φ = 184538160.

The previous prime is 216033863. The next prime is 216033889. The reversal of 216033881 is 188330612.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216033881 is a prime.

It is a super-2 number, since 2×216033881² = 93341275479844322, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (216033889) 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 7 ways as a sum of consecutive naturals, for example, 50615 + ... + 54716.

It is an arithmetic number, because the mean of its divisors is an integer number (30967608).

Almost surely, 2^216033881 is an apocalyptic number.

It is an amenable number.

216033881 is a deficient number, since it is larger than the sum of its proper divisors (31706983).

216033881 is a wasteful number, since it uses less digits than its factorization.

216033881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105631.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 216033881 is about 14698.0910665297. The cubic root of 216033881 is about 600.0313696562.

The spelling of 216033881 in words is "two hundred sixteen million, thirty-three thousand, eight hundred eighty-one".