552530221 has 4 divisors (see below), whose sum is σ = 561895200. Its totient is φ = 543165244.

The previous prime is 552530201. The next prime is 552530239. The reversal of 552530221 is 122035255.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 122035255 = 5 ⋅24407051.

It is a cyclic number.

It is not a de Polignac number, because 552530221 - 2⁷ = 552530093 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 (552530201) 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, 4682401 + ... + 4682518.

It is an arithmetic number, because the mean of its divisors is an integer number (140473800).

Almost surely, 2^552530221 is an apocalyptic number.

It is an amenable number.

552530221 is a deficient number, since it is larger than the sum of its proper divisors (9364979).

552530221 is an equidigital number, since it uses as much as digits as its factorization.

552530221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9364978.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 552530221 is about 23505.9613928042. The cubic root of 552530221 is about 820.5757512121.

Adding to 552530221 its reverse (122035255), we get a palindrome (674565476).

The spelling of 552530221 in words is "five hundred fifty-two million, five hundred thirty thousand, two hundred twenty-one".