551385 has 12 divisors (see below), whose sum is σ = 955812. Its totient is φ = 294048.

The previous prime is 551381. The next prime is 551387. The reversal of 551385 is 583155.

551385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 233289 + 318096 = 483^2 + 564^2 .

It is not a de Polignac number, because 551385 - 2² = 551381 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 551385.

It is not an unprimeable number, because it can be changed into a prime (551381) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6082 + ... + 6171.

It is an arithmetic number, because the mean of its divisors is an integer number (79651).

2⁵⁵¹³⁸⁵ is an apocalyptic number.

It is an amenable number.

551385 is a deficient number, since it is larger than the sum of its proper divisors (404427).

551385 is a wasteful number, since it uses less digits than its factorization.

551385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12264 (or 12261 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 551385 is about 742.5530284094. The cubic root of 551385 is about 82.0008427437. Note that the first 3 decimals are identical.

The spelling of 551385 in words is "five hundred fifty-one thousand, three hundred eighty-five".