82705225 has 6 divisors (see below), whose sum is σ = 102554510. Its totient is φ = 66164160.

The previous prime is 82705223. The next prime is 82705229. The reversal of 82705225 is 52250728.

It can be written as a sum of positive squares in 3 ways, for example, as 5071504 + 77633721 = 2252^2 + 8811^2 .

It is not a de Polignac number, because 82705225 - 2¹ = 82705223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82705223) 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 5 ways as a sum of consecutive naturals, for example, 1654080 + ... + 1654129.

Almost surely, 2^82705225 is an apocalyptic number.

It is an amenable number.

82705225 is a deficient number, since it is larger than the sum of its proper divisors (19849285).

82705225 is a wasteful number, since it uses less digits than its factorization.

82705225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3308219 (or 3308214 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 31.

The square root of 82705225 is about 9094.2413097520. The cubic root of 82705225 is about 435.6900572648.

The spelling of 82705225 in words is "eighty-two million, seven hundred five thousand, two hundred twenty-five".