40302217 has 2 divisors, whose sum is σ = 40302218. Its totient is φ = 40302216.

The previous prime is 40302209. The next prime is 40302247. The reversal of 40302217 is 71220304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27657081 + 12645136 = 5259^2 + 3556^2 .

It is a cyclic number.

It is not a de Polignac number, because 40302217 - 2³ = 40302209 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 40302194 and 40302203.

It is not a weakly prime, because it can be changed into another prime (40302247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20151108 + 20151109.

It is an arithmetic number, because the mean of its divisors is an integer number (20151109).

Almost surely, 2^40302217 is an apocalyptic number.

It is an amenable number.

40302217 is a deficient number, since it is larger than the sum of its proper divisors (1).

40302217 is an equidigital number, since it uses as much as digits as its factorization.

40302217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 40302217 is about 6348.4027124939. The cubic root of 40302217 is about 342.8543355508.

The spelling of 40302217 in words is "forty million, three hundred two thousand, two hundred seventeen".