82180851 has 16 divisors (see below), whose sum is σ = 112963200. Its totient is φ = 53110080.

The previous prime is 82180849. The next prime is 82180853. The reversal of 82180851 is 15808128.

It is an interprime number because it is at equal distance from previous prime (82180849) and next prime (82180853).

It is not a de Polignac number, because 82180851 - 2¹ = 82180849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82180853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18000 + ... + 22098.

It is an arithmetic number, because the mean of its divisors is an integer number (7060200).

Almost surely, 2^82180851 is an apocalyptic number.

82180851 is a deficient number, since it is larger than the sum of its proper divisors (30782349).

82180851 is a wasteful number, since it uses less digits than its factorization.

82180851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4306.

The product of its (nonzero) digits is 5120, while the sum is 33.

The square root of 82180851 is about 9065.3654642270. The cubic root of 82180851 is about 434.7673058552.

Adding to 82180851 its reverse (15808128), we get a palindrome (97988979).

The spelling of 82180851 in words is "eighty-two million, one hundred eighty thousand, eight hundred fifty-one".