551165 has 4 divisors (see below), whose sum is σ = 661404. Its totient is φ = 440928.

The previous prime is 551143. The next prime is 551179. The reversal of 551165 is 561155.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 436921 + 114244 = 661^2 + 338^2 .

It is a cyclic number.

It is not a de Polignac number, because 551165 - 2⁸ = 550909 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 551165.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55112 + ... + 55121.

It is an arithmetic number, because the mean of its divisors is an integer number (165351).

2⁵⁵¹¹⁶⁵ is an apocalyptic number.

It is an amenable number.

551165 is a deficient number, since it is larger than the sum of its proper divisors (110239).

551165 is a wasteful number, since it uses less digits than its factorization.

551165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110238.

The product of its digits is 750, while the sum is 23.

The square root of 551165 is about 742.4048760616. The cubic root of 551165 is about 81.9899353104.

The spelling of 551165 in words is "five hundred fifty-one thousand, one hundred sixty-five".