551166533 has 4 divisors (see below), whose sum is σ = 552802380. Its totient is φ = 549530688.

The previous prime is 551166527. The next prime is 551166559. The reversal of 551166533 is 335661155.

It is a happy number.

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 85340644 + 465825889 = 9238^2 + 21583^2 .

It is a cyclic number.

It is not a de Polignac number, because 551166533 - 2¹⁶ = 551100997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 551166493 and 551166502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551166593) by changing a digit.

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, 817418 + ... + 818091.

It is an arithmetic number, because the mean of its divisors is an integer number (138200595).

Almost surely, 2^551166533 is an apocalyptic number.

It is an amenable number.

551166533 is a deficient number, since it is larger than the sum of its proper divisors (1635847).

551166533 is a wasteful number, since it uses less digits than its factorization.

551166533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1635846.

The product of its digits is 40500, while the sum is 35.

The square root of 551166533 is about 23476.9361927829. The cubic root of 551166533 is about 819.9001132544.

The spelling of 551166533 in words is "five hundred fifty-one million, one hundred sixty-six thousand, five hundred thirty-three".