82100227 has 4 divisors (see below), whose sum is σ = 89563896. Its totient is φ = 74636560.

The previous prime is 82100219. The next prime is 82100237. The reversal of 82100227 is 72200128.

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 82100227 - 2³ = 82100219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 82100198 and 82100207.

It is not an unprimeable number, because it can be changed into a prime (82100237) 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, 3731818 + ... + 3731839.

It is an arithmetic number, because the mean of its divisors is an integer number (22390974).

Almost surely, 2^82100227 is an apocalyptic number.

82100227 is a deficient number, since it is larger than the sum of its proper divisors (7463669).

82100227 is a wasteful number, since it uses less digits than its factorization.

82100227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7463668.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 82100227 is about 9060.9175583933. The cubic root of 82100227 is about 434.6250823405.

Subtracting from 82100227 its reverse (72200128), we obtain a palindrome (9900099).

The spelling of 82100227 in words is "eighty-two million, one hundred thousand, two hundred twenty-seven".