561310819 has 2 divisors, whose sum is σ = 561310820. Its totient is φ = 561310818.

The previous prime is 561310817. The next prime is 561310909. The reversal of 561310819 is 918013165.

561310819 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 is a cyclic number.

It is not a de Polignac number, because 561310819 - 2¹ = 561310817 is a prime.

It is a super-2 number, since 2×561310819² = 630139671052901522, which contains 22 as substring.

Together with 561310817, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (561310817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280655409 + 280655410.

It is an arithmetic number, because the mean of its divisors is an integer number (280655410).

Almost surely, 2^561310819 is an apocalyptic number.

561310819 is a deficient number, since it is larger than the sum of its proper divisors (1).

561310819 is an equidigital number, since it uses as much as digits as its factorization.

561310819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 561310819 is about 23691.9990503123. Note that the first 3 decimals coincide. The cubic root of 561310819 is about 824.8996848949.

The spelling of 561310819 in words is "five hundred sixty-one million, three hundred ten thousand, eight hundred nineteen".