82178055 has 24 divisors (see below), whose sum is σ = 147039360. Its totient is φ = 42413760.

The previous prime is 82178053. The next prime is 82178069. The reversal of 82178055 is 55087128.

It is not a de Polignac number, because 82178055 - 2¹ = 82178053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82178053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28060 + ... + 30849.

It is an arithmetic number, because the mean of its divisors is an integer number (6126640).

Almost surely, 2^82178055 is an apocalyptic number.

82178055 is a deficient number, since it is larger than the sum of its proper divisors (64861305).

82178055 is a wasteful number, since it uses less digits than its factorization.

82178055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58951 (or 58948 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 36.

The square root of 82178055 is about 9065.2112496069. The cubic root of 82178055 is about 434.7623751722.

The spelling of 82178055 in words is "eighty-two million, one hundred seventy-eight thousand, fifty-five".