56518123 has 2 divisors, whose sum is σ = 56518124. Its totient is φ = 56518122.

The previous prime is 56518109. The next prime is 56518127. The reversal of 56518123 is 32181565.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56518123 is a prime.

It is not a weakly prime, because it can be changed into another prime (56518127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28259061 + 28259062.

It is an arithmetic number, because the mean of its divisors is an integer number (28259062).

Almost surely, 2^56518123 is an apocalyptic number.

56518123 is a deficient number, since it is larger than the sum of its proper divisors (1).

56518123 is an equidigital number, since it uses as much as digits as its factorization.

56518123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200, while the sum is 31.

The square root of 56518123 is about 7517.8536165584. The cubic root of 56518123 is about 383.7625371947.

Adding to 56518123 its reverse (32181565), we get a palindrome (88699688).

The spelling of 56518123 in words is "fifty-six million, five hundred eighteen thousand, one hundred twenty-three".