551216 has 20 divisors (see below), whose sum is σ = 1092192. Its totient is φ = 269376.

The previous prime is 551207. The next prime is 551219. The reversal of 551216 is 612155.

551216 = T₈ + T₉ + ... + T₁₄₈.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 551216.

It is not an unprimeable number, because it can be changed into a prime (551219) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 386 + ... + 1118.

2⁵⁵¹²¹⁶ is an apocalyptic number.

It is an amenable number.

551216 is a deficient number, since it is larger than the sum of its proper divisors (540976).

551216 is a wasteful number, since it uses less digits than its factorization.

551216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788 (or 782 counting only the distinct ones).

The product of its digits is 300, while the sum is 20.

The square root of 551216 is about 742.4392231018. The cubic root of 551216 is about 81.9924641102.

It can be divided in two parts, 551 and 216, that added together give a palindrome (767).

The spelling of 551216 in words is "five hundred fifty-one thousand, two hundred sixteen".