553221 has 6 divisors (see below), whose sum is σ = 799110. Its totient is φ = 368808.

The previous prime is 553211. The next prime is 553229. The reversal of 553221 is 122355.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 540225 + 12996 = 735^2 + 114^2 .

It is not a de Polignac number, because 553221 - 2⁷ = 553093 is a prime.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 553194 and 553203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (553229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30726 + ... + 30743.

It is an arithmetic number, because the mean of its divisors is an integer number (133185).

2⁵⁵³²²¹ is an apocalyptic number.

It is an amenable number.

553221 is a deficient number, since it is larger than the sum of its proper divisors (245889).

553221 is a wasteful number, since it uses less digits than its factorization.

553221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61475 (or 61472 counting only the distinct ones).

The product of its digits is 300, while the sum is 18.

The square root of 553221 is about 743.7882763260. The cubic root of 553221 is about 82.0917572901.

Adding to 553221 its reverse (122355), we get a palindrome (675576).

The spelling of 553221 in words is "five hundred fifty-three thousand, two hundred twenty-one".