561219823 has 2 divisors, whose sum is σ = 561219824. Its totient is φ = 561219822.

The previous prime is 561219817. The next prime is 561219829. The reversal of 561219823 is 328912165.

It is a balanced prime because it is at equal distance from previous prime (561219817) and next prime (561219829).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561219823 is a prime.

It is a super-3 number, since 3×561219823³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561219829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280609911 + 280609912.

It is an arithmetic number, because the mean of its divisors is an integer number (280609912).

Almost surely, 2^561219823 is an apocalyptic number.

561219823 is a deficient number, since it is larger than the sum of its proper divisors (1).

561219823 is an equidigital number, since it uses as much as digits as its factorization.

561219823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 37.

The square root of 561219823 is about 23690.0785773285. The cubic root of 561219823 is about 824.8551067243.

The spelling of 561219823 in words is "five hundred sixty-one million, two hundred nineteen thousand, eight hundred twenty-three".