577221 has 4 divisors (see below), whose sum is σ = 769632. Its totient is φ = 384812.

The previous prime is 577219. The next prime is 577249. The reversal of 577221 is 122775.

577221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is not a de Polignac number, because 577221 - 2¹ = 577219 is a prime.

It is an Ulam number.

It is a D-number.

577221 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 577191 and 577200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (577271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96201 + ... + 96206.

It is an arithmetic number, because the mean of its divisors is an integer number (192408).

2⁵⁷⁷²²¹ is an apocalyptic number.

It is an amenable number.

577221 is a deficient number, since it is larger than the sum of its proper divisors (192411).

577221 is a wasteful number, since it uses less digits than its factorization.

577221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192410.

The product of its digits is 980, while the sum is 24.

The square root of 577221 is about 759.7506169790. The cubic root of 577221 is about 83.2621026872.

Adding to 577221 its reverse (122775), we get a palindrome (699996).

The spelling of 577221 in words is "five hundred seventy-seven thousand, two hundred twenty-one".