82191170 has 16 divisors (see below), whose sum is σ = 148524408. Its totient is φ = 32747520.

The previous prime is 82191149. The next prime is 82191253. The reversal of 82191170 is 7119128.

It can be written as a sum of positive squares in 4 ways, for example, as 69538921 + 12652249 = 8339^2 + 3557^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13421 + ... + 18560.

Almost surely, 2^82191170 is an apocalyptic number.

82191170 is a deficient number, since it is larger than the sum of its proper divisors (66333238).

82191170 is a wasteful number, since it uses less digits than its factorization.

82191170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32245.

The product of its (nonzero) digits is 1008, while the sum is 29.

The square root of 82191170 is about 9065.9345905428. The cubic root of 82191170 is about 434.7855022112.

The spelling of 82191170 in words is "eighty-two million, one hundred ninety-one thousand, one hundred seventy".