576221 has 2 divisors, whose sum is σ = 576222. Its totient is φ = 576220.

The previous prime is 576217. The next prime is 576223. The reversal of 576221 is 122675.

Added to its reverse (122675) it gives a square (698896 = 836²).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 470596 + 105625 = 686^2 + 325^2 .

It is a cyclic number.

It is not a de Polignac number, because 576221 - 2² = 576217 is a prime.

Together with 576223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (576223) 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 as a sum of consecutive naturals, namely, 288110 + 288111.

It is an arithmetic number, because the mean of its divisors is an integer number (288111).

2⁵⁷⁶²²¹ is an apocalyptic number.

It is an amenable number.

576221 is a deficient number, since it is larger than the sum of its proper divisors (1).

576221 is an equidigital number, since it uses as much as digits as its factorization.

576221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 840, while the sum is 23.

The square root of 576221 is about 759.0922210114. The cubic root of 576221 is about 83.2139927310.

Adding to 576221 its reverse (122675), we get a palindrome (698896).

It can be divided in two parts, 576 and 221, that added together give a palindrome (797).

The spelling of 576221 in words is "five hundred seventy-six thousand, two hundred twenty-one".