40056217 has 2 divisors, whose sum is σ = 40056218. Its totient is φ = 40056216.

The previous prime is 40056187. The next prime is 40056229. The reversal of 40056217 is 71265004.

40056217 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., 23580736 + 16475481 = 4856^2 + 4059^2 .

It is a cyclic number.

It is not a de Polignac number, because 40056217 - 2¹⁹ = 39531929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40056191 and 40056200.

It is not a weakly prime, because it can be changed into another prime (40056517) 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, 20028108 + 20028109.

It is an arithmetic number, because the mean of its divisors is an integer number (20028109).

Almost surely, 2^40056217 is an apocalyptic number.

It is an amenable number.

40056217 is a deficient number, since it is larger than the sum of its proper divisors (1).

40056217 is an equidigital number, since it uses as much as digits as its factorization.

40056217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 40056217 is about 6328.9981039656. The cubic root of 40056217 is about 342.1553305329.

The spelling of 40056217 in words is "forty million, fifty-six thousand, two hundred seventeen".