551045 has 16 divisors (see below), whose sum is σ = 741312. Its totient is φ = 389760.

The previous prime is 551039. The next prime is 551059. The reversal of 551045 is 540155.

551045 = T₁₆₆ + T₁₆₇ + ... + T₁₉₈.

It is not a de Polignac number, because 551045 - 2⁸ = 550789 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2249 + ... + 2481.

It is an arithmetic number, because the mean of its divisors is an integer number (46332).

2⁵⁵¹⁰⁴⁵ is an apocalyptic number.

551045 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

551045 is a deficient number, since it is larger than the sum of its proper divisors (190267).

551045 is a wasteful number, since it uses less digits than its factorization.

551045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292.

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 551045 is about 742.3240532274. The cubic root of 551045 is about 81.9839845780.

It can be divided in two parts, 5510 and 45, that added together give a palindrome (5555).

The spelling of 551045 in words is "five hundred fifty-one thousand, forty-five".