82145565 has 12 divisors (see below), whose sum is σ = 142385724. Its totient is φ = 43810944.

The previous prime is 82145537. The next prime is 82145593. The reversal of 82145565 is 56554128.

82145565 is a `hidden beast` number, since 82 + 14 + 5 + 565 = 666.

It is an interprime number because it is at equal distance from previous prime (82145537) and next prime (82145593).

It can be written as a sum of positive squares in 2 ways, for example, as 64931364 + 17214201 = 8058^2 + 4149^2 .

It is not a de Polignac number, because 82145565 - 2⁵ = 82145533 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 912684 + ... + 912773.

It is an arithmetic number, because the mean of its divisors is an integer number (11865477).

Almost surely, 2^82145565 is an apocalyptic number.

It is an amenable number.

82145565 is a deficient number, since it is larger than the sum of its proper divisors (60240159).

82145565 is a wasteful number, since it uses less digits than its factorization.

82145565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1825468 (or 1825465 counting only the distinct ones).

The product of its digits is 48000, while the sum is 36.

The square root of 82145565 is about 9063.4190568460. The cubic root of 82145565 is about 434.7050715870.

The spelling of 82145565 in words is "eighty-two million, one hundred forty-five thousand, five hundred sixty-five".