561434111 has 12 divisors (see below), whose sum is σ = 654334920. Its totient is φ = 480317040.

The previous prime is 561434099. The next prime is 561434191. The reversal of 561434111 is 111434165.

It is a de Polignac number, because none of the positive numbers 2^k-561434111 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 (561434191) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15920 + ... + 37098.

It is an arithmetic number, because the mean of its divisors is an integer number (54527910).

Almost surely, 2^561434111 is an apocalyptic number.

561434111 is a deficient number, since it is larger than the sum of its proper divisors (92900809).

561434111 is a wasteful number, since it uses less digits than its factorization.

561434111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21734 (or 21727 counting only the distinct ones).

The product of its digits is 1440, while the sum is 26.

The square root of 561434111 is about 23694.6008829016. The cubic root of 561434111 is about 824.9600769172.

Adding to 561434111 its reverse (111434165), we get a palindrome (672868276).

The spelling of 561434111 in words is "five hundred sixty-one million, four hundred thirty-four thousand, one hundred eleven".