56438052217 has 2 divisors, whose sum is σ = 56438052218. Its totient is φ = 56438052216.

The previous prime is 56438052179. The next prime is 56438052227. The reversal of 56438052217 is 71225083465.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40764013801 + 15674038416 = 201901^2 + 125196^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56438052217 is a prime.

It is not a weakly prime, because it can be changed into another prime (56438052227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28219026108 + 28219026109.

It is an arithmetic number, because the mean of its divisors is an integer number (28219026109).

Almost surely, 2^56438052217 is an apocalyptic number.

It is an amenable number.

56438052217 is a deficient number, since it is larger than the sum of its proper divisors (1).

56438052217 is an equidigital number, since it uses as much as digits as its factorization.

56438052217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 403200, while the sum is 43.

The spelling of 56438052217 in words is "fifty-six billion, four hundred thirty-eight million, fifty-two thousand, two hundred seventeen".