551553 has 8 divisors (see below), whose sum is σ = 742368. Its totient is φ = 364224.

The previous prime is 551549. The next prime is 551557. The reversal of 551553 is 355155.

It is an interprime number because it is at equal distance from previous prime (551549) and next prime (551557).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 551553 - 2² = 551549 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (551557) 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 7 ways as a sum of consecutive naturals, for example, 475 + ... + 1152.

It is an arithmetic number, because the mean of its divisors is an integer number (92796).

2⁵⁵¹⁵⁵³ is an apocalyptic number.

It is an amenable number.

551553 is a deficient number, since it is larger than the sum of its proper divisors (190815).

551553 is a wasteful number, since it uses less digits than its factorization.

551553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1743.

The product of its digits is 1875, while the sum is 24.

The square root of 551553 is about 742.6661430279. Note that the first 3 decimals coincide. The cubic root of 551553 is about 82.0091701028.

The spelling of 551553 in words is "five hundred fifty-one thousand, five hundred fifty-three".