551506 has 8 divisors (see below), whose sum is σ = 830844. Its totient is φ = 274560.

The previous prime is 551503. The next prime is 551519. The reversal of 551506 is 605155.

It can be written as a sum of positive squares in 2 ways, for example, as 410881 + 140625 = 641^2 + 375^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186 + ... + 1066.

2⁵⁵¹⁵⁰⁶ is an apocalyptic number.

551506 is a deficient number, since it is larger than the sum of its proper divisors (279338).

551506 is a wasteful number, since it uses less digits than its factorization.

551506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1196.

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 551506 is about 742.6344996026. The cubic root of 551506 is about 82.0068405953.

The spelling of 551506 in words is "five hundred fifty-one thousand, five hundred six".