82555857 has 6 divisors (see below), whose sum is σ = 119247362. Its totient is φ = 55037232.

The previous prime is 82555841. The next prime is 82555873. The reversal of 82555857 is 75855528.

It is an interprime number because it is at equal distance from previous prime (82555841) and next prime (82555873).

It can be written as a sum of positive squares in only one way, i.e., 74805201 + 7750656 = 8649^2 + 2784^2 .

It is not a de Polignac number, because 82555857 - 2⁴ = 82555841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82555877) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4586428 + ... + 4586445.

Almost surely, 2^82555857 is an apocalyptic number.

It is an amenable number.

82555857 is a deficient number, since it is larger than the sum of its proper divisors (36691505).

82555857 is a wasteful number, since it uses less digits than its factorization.

82555857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9172879 (or 9172876 counting only the distinct ones).

The product of its digits is 560000, while the sum is 45.

The square root of 82555857 is about 9086.0253686637. The cubic root of 82555857 is about 435.4276096403.

The spelling of 82555857 in words is "eighty-two million, five hundred fifty-five thousand, eight hundred fifty-seven".