565425881 has 2 divisors, whose sum is σ = 565425882. Its totient is φ = 565425880.

The previous prime is 565425871. The next prime is 565425907. The reversal of 565425881 is 188524565.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 348158281 + 217267600 = 18659^2 + 14740^2 .

It is a cyclic number.

It is not a de Polignac number, because 565425881 - 2¹⁴ = 565409497 is a prime.

It is a super-2 number, since 2×565425881² = 639412853809252322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (565425841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282712940 + 282712941.

It is an arithmetic number, because the mean of its divisors is an integer number (282712941).

Almost surely, 2^565425881 is an apocalyptic number.

It is an amenable number.

565425881 is a deficient number, since it is larger than the sum of its proper divisors (1).

565425881 is an equidigital number, since it uses as much as digits as its factorization.

565425881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 384000, while the sum is 44.

The square root of 565425881 is about 23778.6854346492. The cubic root of 565425881 is about 826.9106038655.

The spelling of 565425881 in words is "five hundred sixty-five million, four hundred twenty-five thousand, eight hundred eighty-one".