550251261 has 12 divisors (see below), whose sum is σ = 908351392. Its totient is φ = 314429256.

The previous prime is 550251259. The next prime is 550251269. The reversal of 550251261 is 162152055.

550251261 is a `hidden beast` number, since 550 + 2 + 51 + 2 + 61 = 666.

550251261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 550251261 - 2¹ = 550251259 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 (550251269) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4367011 + ... + 4367136.

Almost surely, 2^550251261 is an apocalyptic number.

It is an amenable number.

550251261 is a deficient number, since it is larger than the sum of its proper divisors (358100131).

550251261 is a wasteful number, since it uses less digits than its factorization.

550251261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8734160 (or 8734157 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 550251261 is about 23457.4350899667. The cubic root of 550251261 is about 819.4460173527.

The spelling of 550251261 in words is "five hundred fifty million, two hundred fifty-one thousand, two hundred sixty-one".