216044 has 6 divisors (see below), whose sum is σ = 378084. Its totient is φ = 108020.

The previous prime is 216037. The next prime is 216061. The reversal of 216044 is 440612.

216044 = T₁₂₂ + T₁₂₃ + ... + T₁₄₅.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 216044.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27002 + ... + 27009.

It is an arithmetic number, because the mean of its divisors is an integer number (63014).

216044 is a Friedman number, since it can be written as 60^(2+1)+44, using all its digits and the basic arithmetic operations.

2²¹⁶⁰⁴⁴ is an apocalyptic number.

It is an amenable number.

216044 is a deficient number, since it is larger than the sum of its proper divisors (162040).

216044 is a wasteful number, since it uses less digits than its factorization.

216044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54015 (or 54013 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 216044 is about 464.8053355976. The cubic root of 216044 is about 60.0040737975.

Adding to 216044 its reverse (440612), we get a palindrome (656656).

The spelling of 216044 in words is "two hundred sixteen thousand, forty-four".