82215717 has 16 divisors (see below), whose sum is σ = 116541120. Its totient is φ = 51408000.

The previous prime is 82215691. The next prime is 82215743. The reversal of 82215717 is 71751228.

It is an interprime number because it is at equal distance from previous prime (82215691) and next prime (82215743).

It is not a de Polignac number, because 82215717 - 2⁷ = 82215589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82215787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1384 + ... + 12897.

It is an arithmetic number, because the mean of its divisors is an integer number (7283820).

Almost surely, 2^82215717 is an apocalyptic number.

It is an amenable number.

82215717 is a deficient number, since it is larger than the sum of its proper divisors (34325403).

82215717 is a wasteful number, since it uses less digits than its factorization.

82215717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14404.

The product of its digits is 7840, while the sum is 33.

The square root of 82215717 is about 9067.2882936410. The cubic root of 82215717 is about 434.8287818701.

The spelling of 82215717 in words is "eighty-two million, two hundred fifteen thousand, seven hundred seventeen".