565940214221 has 2 divisors, whose sum is σ = 565940214222. Its totient is φ = 565940214220.

The previous prime is 565940214211. The next prime is 565940214271. The reversal of 565940214221 is 122412049565.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 356349302500 + 209590911721 = 596950^2 + 457811^2 .

It is a cyclic number.

It is not a de Polignac number, because 565940214221 - 2³⁰ = 564866472397 is a prime.

It is a super-2 number, since 2×565940214221² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (565940214211) 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, 282970107110 + 282970107111.

It is an arithmetic number, because the mean of its divisors is an integer number (282970107111).

Almost surely, 2^565940214221 is an apocalyptic number.

It is an amenable number.

565940214221 is a deficient number, since it is larger than the sum of its proper divisors (1).

565940214221 is an equidigital number, since it uses as much as digits as its factorization.

565940214221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 172800, while the sum is 41.

The spelling of 565940214221 in words is "five hundred sixty-five billion, nine hundred forty million, two hundred fourteen thousand, two hundred twenty-one".