82505716 has 6 divisors (see below), whose sum is σ = 144385010. Its totient is φ = 41252856.

The previous prime is 82505713. The next prime is 82505719. The reversal of 82505716 is 61750528.

It is an interprime number because it is at equal distance from previous prime (82505713) and next prime (82505719).

It can be written as a sum of positive squares in only one way, i.e., 61308900 + 21196816 = 7830^2 + 4604^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82505711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10313211 + ... + 10313218.

Almost surely, 2^82505716 is an apocalyptic number.

It is an amenable number.

82505716 is a deficient number, since it is larger than the sum of its proper divisors (61879294).

82505716 is a wasteful number, since it uses less digits than its factorization.

82505716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20626433 (or 20626431 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 82505716 is about 9083.2657122865. The cubic root of 82505716 is about 435.3394382366.

The spelling of 82505716 in words is "eighty-two million, five hundred five thousand, seven hundred sixteen".