551225 has 12 divisors (see below), whose sum is σ = 724284. Its totient is φ = 414720.

The previous prime is 551219. The next prime is 551231. The reversal of 551225 is 522155.

It is an interprime number because it is at equal distance from previous prime (551219) and next prime (551231).

It can be written as a sum of positive squares in 6 ways, for example, as 72361 + 478864 = 269^2 + 692^2 .

It is not a de Polignac number, because 551225 - 2⁸ = 550969 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 551197 and 551206.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 551225.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 224 + ... + 1073.

It is an arithmetic number, because the mean of its divisors is an integer number (60357).

2⁵⁵¹²²⁵ is an apocalyptic number.

It is an amenable number.

551225 is a deficient number, since it is larger than the sum of its proper divisors (173059).

551225 is a wasteful number, since it uses less digits than its factorization.

551225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1324 (or 1319 counting only the distinct ones).

The product of its digits is 500, while the sum is 20.

The square root of 551225 is about 742.4452841792. The cubic root of 551225 is about 81.9929103527.

Subtracting from 551225 its product of digits (500), we obtain a triangular number (550725 = T₁₀₄₉).

The spelling of 551225 in words is "five hundred fifty-one thousand, two hundred twenty-five".