216334441 has 4 divisors (see below), whose sum is σ = 217786500. Its totient is φ = 214882384.

The previous prime is 216334429. The next prime is 216334451. The reversal of 216334441 is 144433612.

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 82446400 + 133888041 = 9080^2 + 11571^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216334441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216334451) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 725806 + ... + 726103.

It is an arithmetic number, because the mean of its divisors is an integer number (54446625).

Almost surely, 2^216334441 is an apocalyptic number.

It is an amenable number.

216334441 is a deficient number, since it is larger than the sum of its proper divisors (1452059).

216334441 is a wasteful number, since it uses less digits than its factorization.

216334441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1452058.

The product of its digits is 6912, while the sum is 28.

The square root of 216334441 is about 14708.3119697673. The cubic root of 216334441 is about 600.3095079066.

The spelling of 216334441 in words is "two hundred sixteen million, three hundred thirty-four thousand, four hundred forty-one".