56215361 has 2 divisors, whose sum is σ = 56215362. Its totient is φ = 56215360.

The previous prime is 56215349. The next prime is 56215363. The reversal of 56215361 is 16351265.

56215361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55965361 + 250000 = 7481^2 + 500^2 .

It is a cyclic number.

It is not a de Polignac number, because 56215361 - 2⁶ = 56215297 is a prime.

It is a Sophie Germain prime.

Together with 56215363, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (56215363) 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, 28107680 + 28107681.

It is an arithmetic number, because the mean of its divisors is an integer number (28107681).

Almost surely, 2^56215361 is an apocalyptic number.

It is an amenable number.

56215361 is a deficient number, since it is larger than the sum of its proper divisors (1).

56215361 is an equidigital number, since it uses as much as digits as its factorization.

56215361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 29.

The square root of 56215361 is about 7497.6903777097. The cubic root of 56215361 is about 383.0760505880.

The spelling of 56215361 in words is "fifty-six million, two hundred fifteen thousand, three hundred sixty-one".