553332321 has 12 divisors (see below), whose sum is σ = 834008448. Its totient is φ = 352849464.

The previous prime is 553332319. The next prime is 553332331. The reversal of 553332321 is 123233355.

553332321 = 4514² + 4515² + ... + 4540².

553332321 is a `hidden beast` number, since 5 + 5 + 3 + 332 + 321 = 666.

553332321 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 553332321 - 2¹ = 553332319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (553332331) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1336345 + ... + 1336758.

It is an arithmetic number, because the mean of its divisors is an integer number (69500704).

Almost surely, 2^553332321 is an apocalyptic number.

It is an amenable number.

553332321 is a deficient number, since it is larger than the sum of its proper divisors (280676127).

553332321 is a wasteful number, since it uses less digits than its factorization.

553332321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2673132 (or 2673129 counting only the distinct ones).

The product of its digits is 8100, while the sum is 27.

The square root of 553332321 is about 23523.0168345814. The cubic root of 553332321 is about 820.9726318108.

Adding to 553332321 its reverse (123233355), we get a palindrome (676565676).

The spelling of 553332321 in words is "five hundred fifty-three million, three hundred thirty-two thousand, three hundred twenty-one".