82171078 has 32 divisors (see below), whose sum is σ = 138008448. Its totient is φ = 36379200.

The previous prime is 82171057. The next prime is 82171091. The reversal of 82171078 is 87017128.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157458 + ... + 157978.

It is an arithmetic number, because the mean of its divisors is an integer number (4312764).

Almost surely, 2^82171078 is an apocalyptic number.

82171078 is a deficient number, since it is larger than the sum of its proper divisors (55837370).

82171078 is a wasteful number, since it uses less digits than its factorization.

82171078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708.

The product of its (nonzero) digits is 6272, while the sum is 34.

The square root of 82171078 is about 9064.8264186359. The cubic root of 82171078 is about 434.7500709021.

The spelling of 82171078 in words is "eighty-two million, one hundred seventy-one thousand, seventy-eight".