551306 has 16 divisors (see below), whose sum is σ = 964224. Its totient is φ = 231504.

The previous prime is 551297. The next prime is 551311. The reversal of 551306 is 603155.

It is an unprimeable number.

551306 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 371 + ... + 1113.

It is an arithmetic number, because the mean of its divisors is an integer number (60264).

2⁵⁵¹³⁰⁶ is an apocalyptic number.

It is a pronic number, being equal to 742×743.

551306 is a deficient number, since it is larger than the sum of its proper divisors (412918).

551306 is a wasteful number, since it uses less digits than its factorization.

551306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 551306 is about 742.4998316498. The cubic root of 551306 is about 81.9969263175.

The spelling of 551306 in words is "five hundred fifty-one thousand, three hundred six".