82180243 has 4 divisors (see below), whose sum is σ = 83027560. Its totient is φ = 81332928.

The previous prime is 82180211. The next prime is 82180271. The reversal of 82180243 is 34208128.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 82180243 - 2⁵ = 82180211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82180283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 423513 + ... + 423706.

It is an arithmetic number, because the mean of its divisors is an integer number (20756890).

Almost surely, 2^82180243 is an apocalyptic number.

82180243 is a deficient number, since it is larger than the sum of its proper divisors (847317).

82180243 is an equidigital number, since it uses as much as digits as its factorization.

82180243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847316.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 82180243 is about 9065.3319299406. The cubic root of 82180243 is about 434.7662336704.

The spelling of 82180243 in words is "eighty-two million, one hundred eighty thousand, two hundred forty-three".