221348 has 6 divisors (see below), whose sum is σ = 387366. Its totient is φ = 110672.

The previous prime is 221327. The next prime is 221393. The reversal of 221348 is 843122.

It can be written as a sum of positive squares in only one way, i.e., 178084 + 43264 = 422^2 + 208^2 .

It is a plaindrome in base 13.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 221348.

It is an unprimeable number.

221348 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 as a sum of consecutive naturals, namely, 27665 + ... + 27672.

It is an arithmetic number, because the mean of its divisors is an integer number (64561).

2²²¹³⁴⁸ is an apocalyptic number.

It is an amenable number.

221348 is a deficient number, since it is larger than the sum of its proper divisors (166018).

221348 is a wasteful number, since it uses less digits than its factorization.

221348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55341 (or 55339 counting only the distinct ones).

The product of its digits is 384, while the sum is 20.

The square root of 221348 is about 470.4763543474. The cubic root of 221348 is about 60.4911536823.

The spelling of 221348 in words is "two hundred twenty-one thousand, three hundred forty-eight".