82213517 has 2 divisors, whose sum is σ = 82213518. Its totient is φ = 82213516.

The previous prime is 82213507. The next prime is 82213559. The reversal of 82213517 is 71531228.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61246276 + 20967241 = 7826^2 + 4579^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82213517 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 82213517.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82213507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41106758 + 41106759.

It is an arithmetic number, because the mean of its divisors is an integer number (41106759).

Almost surely, 2^82213517 is an apocalyptic number.

It is an amenable number.

82213517 is a deficient number, since it is larger than the sum of its proper divisors (1).

82213517 is an equidigital number, since it uses as much as digits as its factorization.

82213517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3360, while the sum is 29.

The square root of 82213517 is about 9067.1669776177. The cubic root of 82213517 is about 434.8249033260.

The spelling of 82213517 in words is "eighty-two million, two hundred thirteen thousand, five hundred seventeen".