248221 has 4 divisors (see below), whose sum is σ = 251100. Its totient is φ = 245344.

The previous prime is 248203. The next prime is 248231. The reversal of 248221 is 122842.

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 99225 + 148996 = 315^2 + 386^2 .

It is a cyclic number.

It is not a de Polignac number, because 248221 - 2⁵ = 248189 is a prime.

It is a super-2 number, since 2×248221² = 123227329682, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (248201) 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, 1306 + ... + 1483.

It is an arithmetic number, because the mean of its divisors is an integer number (62775).

2²⁴⁸²²¹ is an apocalyptic number.

It is an amenable number.

248221 is a deficient number, since it is larger than the sum of its proper divisors (2879).

248221 is an equidigital number, since it uses as much as digits as its factorization.

248221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2878.

The product of its digits is 256, while the sum is 19.

The square root of 248221 is about 498.2178238482. The cubic root of 248221 is about 62.8462700103.

The spelling of 248221 in words is "two hundred forty-eight thousand, two hundred twenty-one".