550405251 has 12 divisors (see below), whose sum is σ = 867305400. Its totient is φ = 333578880.

The previous prime is 550405237. The next prime is 550405267. The reversal of 550405251 is 152504055.

550405251 is a `hidden beast` number, since 5 + 5 + 0 + 405 + 251 = 666.

It is not a de Polignac number, because 550405251 - 2¹⁰ = 550404227 is a prime.

It is not an unprimeable number, because it can be changed into a prime (550405231) 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 11 ways as a sum of consecutive naturals, for example, 2779726 + ... + 2779923.

It is an arithmetic number, because the mean of its divisors is an integer number (72275450).

Almost surely, 2^550405251 is an apocalyptic number.

550405251 is a deficient number, since it is larger than the sum of its proper divisors (316900149).

550405251 is a wasteful number, since it uses less digits than its factorization.

550405251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5559666 (or 5559663 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 27.

The square root of 550405251 is about 23460.7171885260. The cubic root of 550405251 is about 819.5224519635.

The spelling of 550405251 in words is "five hundred fifty million, four hundred five thousand, two hundred fifty-one".