216033939 has 32 divisors (see below), whose sum is σ = 351724800. Its totient is φ = 129962880.

The previous prime is 216033919. The next prime is 216033941. The reversal of 216033939 is 939330612.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-216033939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216033919) 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 31 ways as a sum of consecutive naturals, for example, 38667 + ... + 43899.

It is an arithmetic number, because the mean of its divisors is an integer number (10991400).

Almost surely, 2^216033939 is an apocalyptic number.

216033939 is a deficient number, since it is larger than the sum of its proper divisors (135690861).

216033939 is a wasteful number, since it uses less digits than its factorization.

216033939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5392 (or 5386 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 36.

The square root of 216033939 is about 14698.0930395749. The cubic root of 216033939 is about 600.0314233543.

The spelling of 216033939 in words is "two hundred sixteen million, thirty-three thousand, nine hundred thirty-nine".