56861213 has 2 divisors, whose sum is σ = 56861214. Its totient is φ = 56861212.

The previous prime is 56861183. The next prime is 56861227. The reversal of 56861213 is 31216865.

It is a happy number.

56861213 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., 41705764 + 15155449 = 6458^2 + 3893^2 .

It is a cyclic number.

It is not a de Polignac number, because 56861213 - 2⁶ = 56861149 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56861213.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56861263) 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, 28430606 + 28430607.

It is an arithmetic number, because the mean of its divisors is an integer number (28430607).

Almost surely, 2^56861213 is an apocalyptic number.

It is an amenable number.

56861213 is a deficient number, since it is larger than the sum of its proper divisors (1).

56861213 is an equidigital number, since it uses as much as digits as its factorization.

56861213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 32.

The square root of 56861213 is about 7540.6374398986. The cubic root of 56861213 is about 384.5375072693.

The spelling of 56861213 in words is "fifty-six million, eight hundred sixty-one thousand, two hundred thirteen".