565555 has 4 divisors (see below), whose sum is σ = 678672. Its totient is φ = 452440.

The previous prime is 565553. The next prime is 565559. The reversal of 565555 is 555565.

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

It is not a de Polignac number, because 565555 - 2¹ = 565553 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (565553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56551 + ... + 56560.

It is an arithmetic number, because the mean of its divisors is an integer number (169668).

2⁵⁶⁵⁵⁵⁵ is an apocalyptic number.

565555 is a deficient number, since it is larger than the sum of its proper divisors (113117).

565555 is a wasteful number, since it uses less digits than its factorization.

565555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113116.

The product of its digits is 18750, while the sum is 31.

The square root of 565555 is about 752.0339088100. The cubic root of 565555 is about 82.6973542704.

The spelling of 565555 in words is "five hundred sixty-five thousand, five hundred fifty-five".