56718121 has 2 divisors, whose sum is σ = 56718122. Its totient is φ = 56718120.

The previous prime is 56718107. The next prime is 56718149. The reversal of 56718121 is 12181765.

56718121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46090521 + 10627600 = 6789^2 + 3260^2 .

It is a cyclic number.

It is not a de Polignac number, because 56718121 - 2¹¹ = 56716073 is a prime.

It is not a weakly prime, because it can be changed into another prime (56718821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28359060 + 28359061.

It is an arithmetic number, because the mean of its divisors is an integer number (28359061).

Almost surely, 2^56718121 is an apocalyptic number.

It is an amenable number.

56718121 is a deficient number, since it is larger than the sum of its proper divisors (1).

56718121 is an equidigital number, since it uses as much as digits as its factorization.

56718121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3360, while the sum is 31.

The square root of 56718121 is about 7531.1434058847. The cubic root of 56718121 is about 384.2146717244.

Adding to 56718121 its reverse (12181765), we get a palindrome (68899886).

The spelling of 56718121 in words is "fifty-six million, seven hundred eighteen thousand, one hundred twenty-one".