578221 has 16 divisors (see below), whose sum is σ = 722304. Its totient is φ = 451584.

The previous prime is 578213. The next prime is 578251. The reversal of 578221 is 122875.

578221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 578221 - 2³ = 578213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (578251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5061 + ... + 5173.

It is an arithmetic number, because the mean of its divisors is an integer number (45144).

2⁵⁷⁸²²¹ is an apocalyptic number.

It is an amenable number.

578221 is a deficient number, since it is larger than the sum of its proper divisors (144083).

578221 is a wasteful number, since it uses less digits than its factorization.

578221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180.

The product of its digits is 1120, while the sum is 25.

The square root of 578221 is about 760.4084428779. The cubic root of 578221 is about 83.3101571105.

The spelling of 578221 in words is "five hundred seventy-eight thousand, two hundred twenty-one".