221336 has 16 divisors (see below), whose sum is σ = 421800. Its totient is φ = 108864.

The previous prime is 221327. The next prime is 221393. The reversal of 221336 is 633122.

It is a plaindrome in base 15.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 221336.

It is an unprimeable number.

221336 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 395 + ... + 773.

2²²¹³³⁶ is an apocalyptic number.

It is an amenable number.

221336 is a deficient number, since it is larger than the sum of its proper divisors (200464).

221336 is a wasteful number, since it uses less digits than its factorization.

221336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458 (or 454 counting only the distinct ones).

The product of its digits is 216, while the sum is 17.

The square root of 221336 is about 470.4636011425. The cubic root of 221336 is about 60.4900605214.

Adding to 221336 its reverse (633122), we get a palindrome (854458).

It can be divided in two parts, 22 and 1336, that multiplied together give a palindrome (29392).

The spelling of 221336 in words is "two hundred twenty-one thousand, three hundred thirty-six".