561612103 has 4 divisors (see below), whose sum is σ = 604813048. Its totient is φ = 518411160.

The previous prime is 561612101. The next prime is 561612109. The reversal of 561612103 is 301216165.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 561612103 - 2¹ = 561612101 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561612101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21600453 + ... + 21600478.

It is an arithmetic number, because the mean of its divisors is an integer number (151203262).

Almost surely, 2^561612103 is an apocalyptic number.

561612103 is a deficient number, since it is larger than the sum of its proper divisors (43200945).

561612103 is a wasteful number, since it uses less digits than its factorization.

561612103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43200944.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 561612103 is about 23698.3565463937. The cubic root of 561612103 is about 825.0472470034.

Adding to 561612103 its reverse (301216165), we get a palindrome (862828268).

The spelling of 561612103 in words is "five hundred sixty-one million, six hundred twelve thousand, one hundred three".