82557725 has 12 divisors (see below), whose sum is σ = 102818196. Its totient is φ = 65758080.

The previous prime is 82557677. The next prime is 82557733. The reversal of 82557725 is 52775528.

It can be written as a sum of positive squares in 6 ways, for example, as 727609 + 81830116 = 853^2 + 9046^2 .

It is not a de Polignac number, because 82557725 - 2²⁶ = 15448861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 1262 + ... + 12911.

It is an arithmetic number, because the mean of its divisors is an integer number (8568183).

Almost surely, 2^82557725 is an apocalyptic number.

It is an amenable number.

82557725 is a deficient number, since it is larger than the sum of its proper divisors (20260471).

82557725 is a wasteful number, since it uses less digits than its factorization.

82557725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14416 (or 14411 counting only the distinct ones).

The product of its digits is 196000, while the sum is 41.

The square root of 82557725 is about 9086.1281633048. The cubic root of 82557725 is about 435.4308937709.

The spelling of 82557725 in words is "eighty-two million, five hundred fifty-seven thousand, seven hundred twenty-five".