565721423 has 8 divisors (see below), whose sum is σ = 572083200. Its totient is φ = 559376568.

The previous prime is 565721419. The next prime is 565721467. The reversal of 565721423 is 324127565.

565721423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 565721423 - 2² = 565721419 is a prime.

It is a super-2 number, since 2×565721423² = 640081456882289858, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (565721483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70238 + ... + 77876.

It is an arithmetic number, because the mean of its divisors is an integer number (71510400).

Almost surely, 2^565721423 is an apocalyptic number.

565721423 is a deficient number, since it is larger than the sum of its proper divisors (6361777).

565721423 is a wasteful number, since it uses less digits than its factorization.

565721423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8461.

The product of its digits is 50400, while the sum is 35.

The square root of 565721423 is about 23784.8990538114. The cubic root of 565721423 is about 827.0546511844.

Adding to 565721423 its reverse (324127565), we get a palindrome (889848988).

The spelling of 565721423 in words is "five hundred sixty-five million, seven hundred twenty-one thousand, four hundred twenty-three".