550000000521 has 6 divisors (see below), whose sum is σ = 794444445210. Its totient is φ = 366666667008.

The previous prime is 550000000499. The next prime is 550000000577. The reversal of 550000000521 is 125000000055.

It can be written as a sum of positive squares in only one way, i.e., 379658074896 + 170341925625 = 616164^2 + 412725^2 .

It is not a de Polignac number, because 550000000521 - 2⁷ = 550000000393 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 550000000494 and 550000000503.

It is not an unprimeable number, because it can be changed into a prime (550000000591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30555555576 + ... + 30555555593.

It is an arithmetic number, because the mean of its divisors is an integer number (132407407535).

Almost surely, 2^550000000521 is an apocalyptic number.

It is an amenable number.

550000000521 is a deficient number, since it is larger than the sum of its proper divisors (244444444689).

550000000521 is a wasteful number, since it uses less digits than its factorization.

550000000521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61111111175 (or 61111111172 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 18.

Adding to 550000000521 its reverse (125000000055), we get a palindrome (675000000576).

The spelling of 550000000521 in words is "five hundred fifty billion, five hundred twenty-one", and thus it is an aban number.