551599 has 8 divisors (see below), whose sum is σ = 593568. Its totient is φ = 510720.

The previous prime is 551597. The next prime is 551651. The reversal of 551599 is 995155.

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

It is a cyclic number.

It is not a de Polignac number, because 551599 - 2¹ = 551597 is a prime.

It is a super-2 number, since 2×551599² = 608522913602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551597) 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 7 ways as a sum of consecutive naturals, for example, 979 + ... + 1435.

It is an arithmetic number, because the mean of its divisors is an integer number (74196).

2⁵⁵¹⁵⁹⁹ is an apocalyptic number.

551599 is a deficient number, since it is larger than the sum of its proper divisors (41969).

551599 is a wasteful number, since it uses less digits than its factorization.

551599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545.

The product of its digits is 10125, while the sum is 34.

The square root of 551599 is about 742.6971118834. The cubic root of 551599 is about 82.0114499181.

Subtracting 551599 from its reverse (995155), we obtain a square (443556 = 666²).

The spelling of 551599 in words is "five hundred fifty-one thousand, five hundred ninety-nine".