550412321 has 4 divisors (see below), whose sum is σ = 550980144. Its totient is φ = 549844500.

The previous prime is 550412299. The next prime is 550412323. The reversal of 550412321 is 123214055.

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 a de Polignac number, because none of the positive numbers 2^k-550412321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (550412323) 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, 282455 + ... + 284396.

It is an arithmetic number, because the mean of its divisors is an integer number (137745036).

Almost surely, 2^550412321 is an apocalyptic number.

It is an amenable number.

550412321 is a deficient number, since it is larger than the sum of its proper divisors (567823).

550412321 is an equidigital number, since it uses as much as digits as its factorization.

550412321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567822.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 550412321 is about 23460.8678654478. The cubic root of 550412321 is about 819.5259608925.

Adding to 550412321 its reverse (123214055), we get a palindrome (673626376).

The spelling of 550412321 in words is "five hundred fifty million, four hundred twelve thousand, three hundred twenty-one".