561130823 has 8 divisors (see below), whose sum is σ = 613529856. Its totient is φ = 508963000.

The previous prime is 561130813. The next prime is 561130853. The reversal of 561130823 is 328031165.

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

It is a cyclic number.

It is not a de Polignac number, because 561130823 - 2¹⁶ = 561065287 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 (561130813) 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, 52703 + ... + 62448.

It is an arithmetic number, because the mean of its divisors is an integer number (76691232).

Almost surely, 2^561130823 is an apocalyptic number.

561130823 is a deficient number, since it is larger than the sum of its proper divisors (52399033).

561130823 is a wasteful number, since it uses less digits than its factorization.

561130823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115605.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 561130823 is about 23688.2000793644. The cubic root of 561130823 is about 824.8115017158.

Adding to 561130823 its reverse (328031165), we get a palindrome (889161988).

The spelling of 561130823 in words is "five hundred sixty-one million, one hundred thirty thousand, eight hundred twenty-three".