82104131 has 2 divisors, whose sum is σ = 82104132. Its totient is φ = 82104130.

The previous prime is 82104107. The next prime is 82104173. The reversal of 82104131 is 13140128.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82104131 - 2¹⁰ = 82103107 is a prime.

It is a super-2 number, since 2×82104131² = 13482176654530322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (82104031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41052065 + 41052066.

It is an arithmetic number, because the mean of its divisors is an integer number (41052066).

Almost surely, 2^82104131 is an apocalyptic number.

82104131 is a deficient number, since it is larger than the sum of its proper divisors (1).

82104131 is an equidigital number, since it uses as much as digits as its factorization.

82104131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 82104131 is about 9061.1329865531. The cubic root of 82104131 is about 434.6319712757.

Adding to 82104131 its reverse (13140128), we get a palindrome (95244259).

The spelling of 82104131 in words is "eighty-two million, one hundred four thousand, one hundred thirty-one".