550349621 has 2 divisors, whose sum is σ = 550349622. Its totient is φ = 550349620.

The previous prime is 550349609. The next prime is 550349651. The reversal of 550349621 is 126943055.

550349621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 544522225 + 5827396 = 23335^2 + 2414^2 .

It is a cyclic number.

It is not a de Polignac number, because 550349621 - 2²² = 546155317 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (550349651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275174810 + 275174811.

It is an arithmetic number, because the mean of its divisors is an integer number (275174811).

Almost surely, 2^550349621 is an apocalyptic number.

It is an amenable number.

550349621 is a deficient number, since it is larger than the sum of its proper divisors (1).

550349621 is an equidigital number, since it uses as much as digits as its factorization.

550349621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 550349621 is about 23459.5315596881. The cubic root of 550349621 is about 819.4948410532.

The spelling of 550349621 in words is "five hundred fifty million, three hundred forty-nine thousand, six hundred twenty-one".