563371321 has 2 divisors, whose sum is σ = 563371322. Its totient is φ = 563371320.

The previous prime is 563371271. The next prime is 563371349. The reversal of 563371321 is 123173365.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 544708921 + 18662400 = 23339^2 + 4320^2 .

It is a cyclic number.

It is not a de Polignac number, because 563371321 - 2²¹ = 561274169 is a prime.

It is a super-4 number, since 4×563371321⁴ (a number of 36 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (563371351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 281685660 + 281685661.

It is an arithmetic number, because the mean of its divisors is an integer number (281685661).

Almost surely, 2^563371321 is an apocalyptic number.

It is an amenable number.

563371321 is a deficient number, since it is larger than the sum of its proper divisors (1).

563371321 is an equidigital number, since it uses as much as digits as its factorization.

563371321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11340, while the sum is 31.

The square root of 563371321 is about 23735.4444028335. Note that the first 4 decimals coincide. The cubic root of 563371321 is about 825.9078202687.

The spelling of 563371321 in words is "five hundred sixty-three million, three hundred seventy-one thousand, three hundred twenty-one".