551775 has 24 divisors (see below), whose sum is σ = 1043584. Its totient is φ = 252000.

The previous prime is 551773. The next prime is 551801. The reversal of 551775 is 577155.

551775 is a nontrivial binomial coefficient, being equal to C(1051, 2).

It is not a de Polignac number, because 551775 - 2¹ = 551773 is a prime.

It is a nude number because it is divisible by every one of its digits.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551773) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1 + ... + 1050.

2⁵⁵¹⁷⁷⁵ is an apocalyptic number.

551775 is the 1050-th triangular number.

551775 is a deficient number, since it is larger than the sum of its proper divisors (491809).

551775 is a wasteful number, since it uses less digits than its factorization.

551775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071 (or 1066 counting only the distinct ones).

The product of its digits is 6125, while the sum is 30.

The square root of 551775 is about 742.8155894972. The cubic root of 551775 is about 82.0201715198.

It can be divided in two parts, 551 and 775, that added together give a triangular number (1326 = T₅₁).

The spelling of 551775 in words is "five hundred fifty-one thousand, seven hundred seventy-five".