82057285 has 4 divisors (see below), whose sum is σ = 98468748. Its totient is φ = 65645824.

The previous prime is 82057237. The next prime is 82057309. The reversal of 82057285 is 58275028.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32058244 + 49999041 = 5662^2 + 7071^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82057285 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8205724 + ... + 8205733.

It is an arithmetic number, because the mean of its divisors is an integer number (24617187).

Almost surely, 2^82057285 is an apocalyptic number.

It is an amenable number.

82057285 is a deficient number, since it is larger than the sum of its proper divisors (16411463).

82057285 is a wasteful number, since it uses less digits than its factorization.

82057285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16411462.

The product of its (nonzero) digits is 44800, while the sum is 37.

The square root of 82057285 is about 9058.5476208938. The cubic root of 82057285 is about 434.5492931664.

The spelling of 82057285 in words is "eighty-two million, fifty-seven thousand, two hundred eighty-five".