565331 has 4 divisors (see below), whose sum is σ = 608832. Its totient is φ = 521832.

The previous prime is 565319. The next prime is 565333. The reversal of 565331 is 133565.

Added to its reverse (133565) it gives a square (698896 = 836²).

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133565 = 5 ⋅26713.

It is a cyclic number.

It is not a de Polignac number, because 565331 - 2¹⁰ = 564307 is a prime.

It is a super-2 number, since 2×565331² = 639198279122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 565297 and 565306.

It is not an unprimeable number, because it can be changed into a prime (565333) 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, 21731 + ... + 21756.

It is an arithmetic number, because the mean of its divisors is an integer number (152208).

2⁵⁶⁵³³¹ is an apocalyptic number.

565331 is a deficient number, since it is larger than the sum of its proper divisors (43501).

565331 is a wasteful number, since it uses less digits than its factorization.

565331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43500.

The product of its digits is 1350, while the sum is 23.

The square root of 565331 is about 751.8849646056. The cubic root of 565331 is about 82.6864348175.

Adding to 565331 its reverse (133565), we get a palindrome (698896).

The spelling of 565331 in words is "five hundred sixty-five thousand, three hundred thirty-one".