565605631 has 2 divisors, whose sum is σ = 565605632. Its totient is φ = 565605630.

The previous prime is 565605629. The next prime is 565605641. The reversal of 565605631 is 136506565.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 565605631 - 2¹ = 565605629 is a prime.

It is a super-2 number, since 2×565605631² = 639819459637816322, which contains 22 as substring.

Together with 565605629, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (565605641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282802815 + 282802816.

It is an arithmetic number, because the mean of its divisors is an integer number (282802816).

Almost surely, 2^565605631 is an apocalyptic number.

565605631 is a deficient number, since it is larger than the sum of its proper divisors (1).

565605631 is an equidigital number, since it uses as much as digits as its factorization.

565605631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81000, while the sum is 37.

The square root of 565605631 is about 23782.4647797490. The cubic root of 565605631 is about 826.9982200843.

The spelling of 565605631 in words is "five hundred sixty-five million, six hundred five thousand, six hundred thirty-one".