561054213103 has 4 divisors (see below), whose sum is σ = 561307741848. Its totient is φ = 560800684360.

The previous prime is 561054213079. The next prime is 561054213107. The reversal of 561054213103 is 301312450165.

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 561054213103 - 2¹⁷ = 561054082031 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 (561054213107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126761053 + ... + 126765478.

It is an arithmetic number, because the mean of its divisors is an integer number (140326935462).

Almost surely, 2^561054213103 is an apocalyptic number.

561054213103 is a deficient number, since it is larger than the sum of its proper divisors (253528745).

561054213103 is a wasteful number, since it uses less digits than its factorization.

561054213103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253528744.

The product of its (nonzero) digits is 10800, while the sum is 31.

Adding to 561054213103 its reverse (301312450165), we get a palindrome (862366663268).

The spelling of 561054213103 in words is "five hundred sixty-one billion, fifty-four million, two hundred thirteen thousand, one hundred three".