565553 has 2 divisors, whose sum is σ = 565554. Its totient is φ = 565552.

The previous prime is 565549. The next prime is 565559. The reversal of 565553 is 355565.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 565504 + 49 = 752^2 + 7^2 .

It is a cyclic number.

It is not a de Polignac number, because 565553 - 2² = 565549 is a prime.

It is a Chen prime.

It is a plaindrome in base 11 and base 12.

It is not a weakly prime, because it can be changed into another prime (565559) 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 as a sum of consecutive naturals, namely, 282776 + 282777.

It is an arithmetic number, because the mean of its divisors is an integer number (282777).

2⁵⁶⁵⁵⁵³ is an apocalyptic number.

It is an amenable number.

565553 is a deficient number, since it is larger than the sum of its proper divisors (1).

565553 is an equidigital number, since it uses as much as digits as its factorization.

565553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11250, while the sum is 29.

The square root of 565553 is about 752.0325790815. The cubic root of 565553 is about 82.6972567880.

It can be divided in two parts, 565 and 553, that multiplied together give a triangular number (312445 = T₇₉₀).

The spelling of 565553 in words is "five hundred sixty-five thousand, five hundred fifty-three".