550610621 has 6 divisors (see below), whose sum is σ = 605216766. Its totient is φ = 500555000.

The previous prime is 550610611. The next prime is 550610651. The reversal of 550610621 is 126016055.

550610621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 546904996 + 3705625 = 23386^2 + 1925^2 .

It is a de Polignac number, because none of the positive numbers 2^k-550610621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550610611) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2275130 + ... + 2275371.

It is an arithmetic number, because the mean of its divisors is an integer number (100869461).

Almost surely, 2^550610621 is an apocalyptic number.

It is an amenable number.

550610621 is a deficient number, since it is larger than the sum of its proper divisors (54606145).

550610621 is a wasteful number, since it uses less digits than its factorization.

550610621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4550523 (or 4550512 counting only the distinct ones).

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

The square root of 550610621 is about 23465.0936712386. The cubic root of 550610621 is about 819.6243674139.

Adding to 550610621 its reverse (126016055), we get a palindrome (676626676).

The spelling of 550610621 in words is "five hundred fifty million, six hundred ten thousand, six hundred twenty-one".