216044441 has 4 divisors (see below), whose sum is σ = 216366132. Its totient is φ = 215722752.

The previous prime is 216044417. The next prime is 216044447. The reversal of 216044441 is 144440612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 131790400 + 84254041 = 11480^2 + 9179^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216044441 is a prime.

It is a super-3 number, since 3×216044441³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 216044441.

It is not an unprimeable number, because it can be changed into a prime (216044447) 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, 159836 + ... + 161181.

It is an arithmetic number, because the mean of its divisors is an integer number (54091533).

Almost surely, 2^216044441 is an apocalyptic number.

It is an amenable number.

216044441 is a deficient number, since it is larger than the sum of its proper divisors (321691).

216044441 is an equidigital number, since it uses as much as digits as its factorization.

216044441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321690.

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 216044441 is about 14698.4502924628. The cubic root of 216044441 is about 600.0411462523.

The spelling of 216044441 in words is "two hundred sixteen million, forty-four thousand, four hundred forty-one".