40416217 has 2 divisors, whose sum is σ = 40416218. Its totient is φ = 40416216.

The previous prime is 40416203. The next prime is 40416289. The reversal of 40416217 is 71261404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40208281 + 207936 = 6341^2 + 456^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40416217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40416191 and 40416200.

It is not a weakly prime, because it can be changed into another prime (40416017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20208108 + 20208109.

It is an arithmetic number, because the mean of its divisors is an integer number (20208109).

Almost surely, 2^40416217 is an apocalyptic number.

It is an amenable number.

40416217 is a deficient number, since it is larger than the sum of its proper divisors (1).

40416217 is an equidigital number, since it uses as much as digits as its factorization.

40416217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 40416217 is about 6357.3750086022. The cubic root of 40416217 is about 343.1773004087.

The spelling of 40416217 in words is "forty million, four hundred sixteen thousand, two hundred seventeen".