221332 has 6 divisors (see below), whose sum is σ = 387338. Its totient is φ = 110664.

The previous prime is 221327. The next prime is 221393. The reversal of 221332 is 233122.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 156816 + 64516 = 396^2 + 254^2 .

It is a congruent number.

It is an unprimeable 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 as a sum of consecutive naturals, namely, 27663 + ... + 27670.

2²²¹³³² is an apocalyptic number.

It is an amenable number.

221332 is a deficient number, since it is larger than the sum of its proper divisors (166006).

221332 is a wasteful number, since it uses less digits than its factorization.

221332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55337 (or 55335 counting only the distinct ones).

The product of its digits is 72, while the sum is 13.

The square root of 221332 is about 470.4593499974. The cubic root of 221332 is about 60.4896961256.

Adding to 221332 its reverse (233122), we get a palindrome (454454).

The spelling of 221332 in words is "two hundred twenty-one thousand, three hundred thirty-two".