566531 has 4 divisors (see below), whose sum is σ = 647472. Its totient is φ = 485592.

The previous prime is 566521. The next prime is 566537. The reversal of 566531 is 135665.

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

It is a cyclic number.

It is not a de Polignac number, because 566531 - 2¹⁰ = 565507 is a prime.

It is a super-2 number, since 2×566531² = 641914747922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 566531.

It is not an unprimeable number, because it can be changed into a prime (566537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40460 + ... + 40473.

It is an arithmetic number, because the mean of its divisors is an integer number (161868).

2⁵⁶⁶⁵³¹ is an apocalyptic number.

566531 is a deficient number, since it is larger than the sum of its proper divisors (80941).

566531 is an equidigital number, since it uses as much as digits as its factorization.

566531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80940.

The product of its digits is 2700, while the sum is 26.

The square root of 566531 is about 752.6825360004. The cubic root of 566531 is about 82.7448982656.

The spelling of 566531 in words is "five hundred sixty-six thousand, five hundred thirty-one".