550452821 has 4 divisors (see below), whose sum is σ = 550554444. Its totient is φ = 550351200.

The previous prime is 550452797. The next prime is 550452827. The reversal of 550452821 is 128254055.

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 443102500 + 107350321 = 21050^2 + 10361^2 .

It is a cyclic number.

It is not a de Polignac number, because 550452821 - 2¹⁸ = 550190677 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 (550452827) 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, 42200 + ... + 53681.

It is an arithmetic number, because the mean of its divisors is an integer number (137638611).

Almost surely, 2^550452821 is an apocalyptic number.

It is an amenable number.

550452821 is a deficient number, since it is larger than the sum of its proper divisors (101623).

550452821 is an equidigital number, since it uses as much as digits as its factorization.

550452821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101622.

The product of its (nonzero) digits is 16000, while the sum is 32.

The square root of 550452821 is about 23461.7309889957. The cubic root of 550452821 is about 819.5460609679.

The spelling of 550452821 in words is "five hundred fifty million, four hundred fifty-two thousand, eight hundred twenty-one".