550503261 has 48 divisors (see below), whose sum is σ = 993632640. Its totient is φ = 285327360.

The previous prime is 550503211. The next prime is 550503271. The reversal of 550503261 is 162305055.

550503261 is a `hidden beast` number, since 550 + 50 + 3 + 2 + 61 = 666.

It is not a de Polignac number, because 550503261 - 2¹⁰ = 550502237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550503211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 532401 + ... + 533433.

It is an arithmetic number, because the mean of its divisors is an integer number (20700680).

Almost surely, 2^550503261 is an apocalyptic number.

It is an amenable number.

550503261 is a deficient number, since it is larger than the sum of its proper divisors (443129379).

550503261 is a wasteful number, since it uses less digits than its factorization.

550503261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1826 (or 1823 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 550503261 is about 23462.8059063702. The cubic root of 550503261 is about 819.5710928684.

It can be divided in two parts, 55050 and 3261, that added together give a triangular number (58311 = T₃₄₁).

The spelling of 550503261 in words is "five hundred fifty million, five hundred three thousand, two hundred sixty-one".