82280565 has 24 divisors (see below), whose sum is σ = 142967448. Its totient is φ = 43776000.

The previous prime is 82280537. The next prime is 82280567. The reversal of 82280565 is 56508228.

It can be written as a sum of positive squares in 4 ways, for example, as 4435236 + 77845329 = 2106^2 + 8823^2 .

It is not a de Polignac number, because 82280565 - 2⁹ = 82280053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82280567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18565 + ... + 22565.

It is an arithmetic number, because the mean of its divisors is an integer number (5956977).

Almost surely, 2^82280565 is an apocalyptic number.

It is an amenable number.

82280565 is a deficient number, since it is larger than the sum of its proper divisors (60686883).

82280565 is a wasteful number, since it uses less digits than its factorization.

82280565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4469 (or 4466 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 82280565 is about 9070.8635200845. The cubic root of 82280565 is about 434.9430761819.

The spelling of 82280565 in words is "eighty-two million, two hundred eighty thousand, five hundred sixty-five".