82811725 has 12 divisors (see below), whose sum is σ = 102800340. Its totient is φ = 66176000.

The previous prime is 82811723. The next prime is 82811731. The reversal of 82811725 is 52711828.

It can be written as a sum of positive squares in 6 ways, for example, as 110889 + 82700836 = 333^2 + 9094^2 .

It is not a de Polignac number, because 82811725 - 2¹ = 82811723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82811723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38991 + ... + 41059.

It is an arithmetic number, because the mean of its divisors is an integer number (8566695).

Almost surely, 2^82811725 is an apocalyptic number.

It is an amenable number.

82811725 is a deficient number, since it is larger than the sum of its proper divisors (19988615).

82811725 is a wasteful number, since it uses less digits than its factorization.

82811725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3680 (or 3675 counting only the distinct ones).

The product of its digits is 8960, while the sum is 34.

The square root of 82811725 is about 9100.0947797262. The cubic root of 82811725 is about 435.8769905909.

The spelling of 82811725 in words is "eighty-two million, eight hundred eleven thousand, seven hundred twenty-five".