550324021 has 4 divisors (see below), whose sum is σ = 592656652. Its totient is φ = 507991392.

The previous prime is 550324009. The next prime is 550324067. The reversal of 550324021 is 120423055.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 200222500 + 350101521 = 14150^2 + 18711^2 .

It is a cyclic number.

It is not a de Polignac number, because 550324021 - 2⁵ = 550323989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 550323983 and 550324001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550324001) 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, 21166296 + ... + 21166321.

It is an arithmetic number, because the mean of its divisors is an integer number (148164163).

Almost surely, 2^550324021 is an apocalyptic number.

It is an amenable number.

550324021 is a deficient number, since it is larger than the sum of its proper divisors (42332631).

550324021 is a wasteful number, since it uses less digits than its factorization.

550324021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42332630.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 550324021 is about 23458.9859329000. The cubic root of 550324021 is about 819.4821343467.

Adding to 550324021 its reverse (120423055), we get a palindrome (670747076).

The spelling of 550324021 in words is "five hundred fifty million, three hundred twenty-four thousand, twenty-one".