565271381 has 2 divisors, whose sum is σ = 565271382. Its totient is φ = 565271380.

The previous prime is 565271363. The next prime is 565271411. The reversal of 565271381 is 183172565.

565271381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 401200900 + 164070481 = 20030^2 + 12809^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-565271381 is a prime.

It is a super-2 number, since 2×565271381² = 639063468355294322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (565271351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282635690 + 282635691.

It is an arithmetic number, because the mean of its divisors is an integer number (282635691).

Almost surely, 2^565271381 is an apocalyptic number.

It is an amenable number.

565271381 is a deficient number, since it is larger than the sum of its proper divisors (1).

565271381 is an equidigital number, since it uses as much as digits as its factorization.

565271381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50400, while the sum is 38.

The square root of 565271381 is about 23775.4365049309. The cubic root of 565271381 is about 826.8352805085.

The spelling of 565271381 in words is "five hundred sixty-five million, two hundred seventy-one thousand, three hundred eighty-one".