551266 has 16 divisors (see below), whose sum is σ = 885600. Its totient is φ = 256608.

The previous prime is 551233. The next prime is 551269. The reversal of 551266 is 662155.

It is a self number, because there is not a number n which added to its sum of digits gives 551266.

It is not an unprimeable number, because it can be changed into a prime (551269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3301 + ... + 3463.

It is an arithmetic number, because the mean of its divisors is an integer number (55350).

2⁵⁵¹²⁶⁶ is an apocalyptic number.

551266 is a deficient number, since it is larger than the sum of its proper divisors (334334).

551266 is a wasteful number, since it uses less digits than its factorization.

551266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273.

The product of its digits is 1800, while the sum is 25.

The square root of 551266 is about 742.4728951282. The cubic root of 551266 is about 81.9949431742.

Subtracting 551266 from its reverse (662155), we obtain a square (110889 = 333²).

The spelling of 551266 in words is "five hundred fifty-one thousand, two hundred sixty-six".