402516217 has 2 divisors, whose sum is σ = 402516218. Its totient is φ = 402516216.

The previous prime is 402516203. The next prime is 402516221. The reversal of 402516217 is 712615204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 374383801 + 28132416 = 19349^2 + 5304^2 .

It is a cyclic number.

It is not a de Polignac number, because 402516217 - 2¹¹ = 402514169 is a prime.

It is not a weakly prime, because it can be changed into another prime (402516017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201258108 + 201258109.

It is an arithmetic number, because the mean of its divisors is an integer number (201258109).

Almost surely, 2^402516217 is an apocalyptic number.

It is an amenable number.

402516217 is a deficient number, since it is larger than the sum of its proper divisors (1).

402516217 is an equidigital number, since it uses as much as digits as its factorization.

402516217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 402516217 is about 20062.8068076229. The cubic root of 402516217 is about 738.3480418824.

The spelling of 402516217 in words is "four hundred two million, five hundred sixteen thousand, two hundred seventeen".