561059321 has 2 divisors, whose sum is σ = 561059322. Its totient is φ = 561059320.

The previous prime is 561059311. The next prime is 561059353. The reversal of 561059321 is 123950165.

561059321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (561059353) can be obtained adding 561059321 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 558613225 + 2446096 = 23635^2 + 1564^2 .

It is a cyclic number.

It is not a de Polignac number, because 561059321 - 2¹⁸ = 560797177 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (561059311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280529660 + 280529661.

It is an arithmetic number, because the mean of its divisors is an integer number (280529661).

Almost surely, 2^561059321 is an apocalyptic number.

It is an amenable number.

561059321 is a deficient number, since it is larger than the sum of its proper divisors (1).

561059321 is an equidigital number, since it uses as much as digits as its factorization.

561059321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8100, while the sum is 32.

The square root of 561059321 is about 23686.6907988431. The cubic root of 561059321 is about 824.7764664057.

The spelling of 561059321 in words is "five hundred sixty-one million, fifty-nine thousand, three hundred twenty-one".