550551405 has 32 divisors (see below), whose sum is σ = 890523648. Its totient is φ = 290433600.

The previous prime is 550551401. The next prime is 550551427. The reversal of 550551405 is 504155055.

It is not a de Polignac number, because 550551405 - 2² = 550551401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550551401) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 678450 + ... + 679260.

It is an arithmetic number, because the mean of its divisors is an integer number (27828864).

Almost surely, 2^550551405 is an apocalyptic number.

It is an amenable number.

550551405 is a deficient number, since it is larger than the sum of its proper divisors (339972243).

550551405 is a wasteful number, since it uses less digits than its factorization.

550551405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1257.

The product of its (nonzero) digits is 12500, while the sum is 30.

The square root of 550551405 is about 23463.8318481871. The cubic root of 550551405 is about 819.5949839049.

The spelling of 550551405 in words is "five hundred fifty million, five hundred fifty-one thousand, four hundred five".