550415521 has 2 divisors, whose sum is σ = 550415522. Its totient is φ = 550415520.

The previous prime is 550415483. The next prime is 550415527. The reversal of 550415521 is 125514055.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 327211921 + 223203600 = 18089^2 + 14940^2 .

It is a cyclic number.

It is not a de Polignac number, because 550415521 - 2¹¹ = 550413473 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 550415521.

It is not a weakly prime, because it can be changed into another prime (550415527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275207760 + 275207761.

It is an arithmetic number, because the mean of its divisors is an integer number (275207761).

Almost surely, 2^550415521 is an apocalyptic number.

It is an amenable number.

550415521 is a deficient number, since it is larger than the sum of its proper divisors (1).

550415521 is an equidigital number, since it uses as much as digits as its factorization.

550415521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5000, while the sum is 28.

The square root of 550415521 is about 23460.9360640193. The cubic root of 550415521 is about 819.5275490825.

Adding to 550415521 its reverse (125514055), we get a palindrome (675929576).

It can be divided in two parts, 5504 and 15521, that added together give a square (21025 = 145²).

The spelling of 550415521 in words is "five hundred fifty million, four hundred fifteen thousand, five hundred twenty-one".