550106621 has 8 divisors (see below), whose sum is σ = 584459064. Its totient is φ = 515975680.

The previous prime is 550106591. The next prime is 550106629. The reversal of 550106621 is 126601055.

It can be written as a sum of positive squares in 4 ways, for example, as 196140025 + 353966596 = 14005^2 + 18814^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 550106621 - 2¹⁰ = 550105597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550106629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50240 + ... + 60201.

It is an arithmetic number, because the mean of its divisors is an integer number (73057383).

Almost surely, 2^550106621 is an apocalyptic number.

It is an amenable number.

550106621 is a deficient number, since it is larger than the sum of its proper divisors (34352443).

550106621 is a wasteful number, since it uses less digits than its factorization.

550106621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110751.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 550106621 is about 23454.3518563187. The cubic root of 550106621 is about 819.3742107273.

Adding to 550106621 its reverse (126601055), we get a palindrome (676707676).

The spelling of 550106621 in words is "five hundred fifty million, one hundred six thousand, six hundred twenty-one".