531566 has 16 divisors (see below), whose sum is σ = 933504. Its totient is φ = 222264.

The previous prime is 531551. The next prime is 531569. The reversal of 531566 is 665135.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161 + ... + 1043.

It is an arithmetic number, because the mean of its divisors is an integer number (58344).

531566 is a Friedman number, since it can be written as (15-6)^6+5^3, using all its digits and the basic arithmetic operations.

2⁵³¹⁵⁶⁶ is an apocalyptic number.

531566 is a deficient number, since it is larger than the sum of its proper divisors (401938).

531566 is a wasteful number, since it uses less digits than its factorization.

531566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 935.

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

The square root of 531566 is about 729.0857288413. The cubic root of 531566 is about 81.0063501601.

The spelling of 531566 in words is "five hundred thirty-one thousand, five hundred sixty-six".