215083717 has 2 divisors, whose sum is σ = 215083718. Its totient is φ = 215083716.

The previous prime is 215083697. The next prime is 215083727. The reversal of 215083717 is 717380512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209844196 + 5239521 = 14486^2 + 2289^2 .

It is a cyclic number.

It is not a de Polignac number, because 215083717 - 2²⁷ = 80865989 is a prime.

It is a super-2 number, since 2×215083717² = 92522010637072178, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215083727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107541858 + 107541859.

It is an arithmetic number, because the mean of its divisors is an integer number (107541859).

Almost surely, 2^215083717 is an apocalyptic number.

It is an amenable number.

215083717 is a deficient number, since it is larger than the sum of its proper divisors (1).

215083717 is an equidigital number, since it uses as much as digits as its factorization.

215083717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11760, while the sum is 34.

The square root of 215083717 is about 14665.7327467808. The cubic root of 215083717 is about 599.1503873131.

The spelling of 215083717 in words is "two hundred fifteen million, eighty-three thousand, seven hundred seventeen".