160221 has 4 divisors (see below), whose sum is σ = 213632. Its totient is φ = 106812.

The previous prime is 160217. The next prime is 160231. The reversal of 160221 is 122061.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 160221 - 2² = 160217 is a prime.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 160197 and 160206.

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 160221.

It is not an unprimeable number, because it can be changed into a prime (160201) 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, 26701 + ... + 26706.

It is an arithmetic number, because the mean of its divisors is an integer number (53408).

2¹⁶⁰²²¹ is an apocalyptic number.

It is an amenable number.

160221 is a deficient number, since it is larger than the sum of its proper divisors (53411).

160221 is an equidigital number, since it uses as much as digits as its factorization.

160221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53410.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 160221 is about 400.2761546732. The cubic root of 160221 is about 54.3133360947.

Adding to 160221 its reverse (122061), we get a palindrome (282282).

The spelling of 160221 in words is "one hundred sixty thousand, two hundred twenty-one".