561042823 has 8 divisors (see below), whose sum is σ = 648049680. Its totient is φ = 480036480.

The previous prime is 561042799. The next prime is 561042851. The reversal of 561042823 is 328240165.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 561042823 - 2⁹ = 561042311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561042883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1499928 + ... + 1500301.

It is an arithmetic number, because the mean of its divisors is an integer number (81006210).

Almost surely, 2^561042823 is an apocalyptic number.

561042823 is a deficient number, since it is larger than the sum of its proper divisors (87006857).

561042823 is a wasteful number, since it uses less digits than its factorization.

561042823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3000257.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 561042823 is about 23686.3425416420. The cubic root of 561042823 is about 824.7683821177.

Adding to 561042823 its reverse (328240165), we get a palindrome (889282988).

The spelling of 561042823 in words is "five hundred sixty-one million, forty-two thousand, eight hundred twenty-three".