56569 has 2 divisors, whose sum is σ = 56570.
Its totient is φ = 56568.
The previous prime is 56543. The next prime is 56591. The reversal of 56569 is 96565.
It is a happy number.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 56169 + 400 = 237^2 + 20^2
It is a cyclic number.
It is not a de Polignac number, because 56569 - 211 = 54521 is a prime.
It is a super-2 number, since 2×565692 = 6400103522, which contains 22 as substring.
It is an alternating number because its digits alternate between odd and even.
It is a plaindrome in base 14.
It is a self number, because there is not a number n which added to its sum of digits gives 56569.
It is not a weakly prime, because it can be changed into another prime (56509) 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 as a sum of consecutive naturals, namely, 28284 + 28285.
It is an arithmetic number, because the mean of its divisors is an integer number (28285).
256569 is an apocalyptic number.
It is an amenable number.
56569 is a deficient number, since it is larger than the sum of its proper divisors (1).
56569 is an equidigital number, since it uses as much as digits as its factorization.
56569 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 8100, while the sum is 31.
The square root of 56569 is about 237.8423847845.
The cubic root of 56569 is about 38.3877655614.
It can be divided in two parts, 5656 and 9, that added together give a palindrome (5665).
The spelling of 56569 in words is "fifty-six thousand, five hundred sixty-nine".