40545217 has 2 divisors, whose sum is σ = 40545218. Its totient is φ = 40545216.

The previous prime is 40545203. The next prime is 40545223. The reversal of 40545217 is 71254504.

40545217 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., 35509681 + 5035536 = 5959^2 + 2244^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40545217 is a prime.

It is not a weakly prime, because it can be changed into another prime (40545257) 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, 20272608 + 20272609.

It is an arithmetic number, because the mean of its divisors is an integer number (20272609).

Almost surely, 2^40545217 is an apocalyptic number.

It is an amenable number.

40545217 is a deficient number, since it is larger than the sum of its proper divisors (1).

40545217 is an equidigital number, since it uses as much as digits as its factorization.

40545217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5600, while the sum is 28.

The square root of 40545217 is about 6367.5126226809. The cubic root of 40545217 is about 343.5420290446.

The spelling of 40545217 in words is "forty million, five hundred forty-five thousand, two hundred seventeen".