82505979131 has 2 divisors, whose sum is σ = 82505979132. Its totient is φ = 82505979130.

The previous prime is 82505979091. The next prime is 82505979139. The reversal of 82505979131 is 13197950528.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 82505979131 - 2⁶ = 82505979067 is a prime.

It is a super-2 number, since 2×82505979131² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 82505979131.

It is not a weakly prime, because it can be changed into another prime (82505979139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41252989565 + 41252989566.

It is an arithmetic number, because the mean of its divisors is an integer number (41252989566).

Almost surely, 2^82505979131 is an apocalyptic number.

82505979131 is a deficient number, since it is larger than the sum of its proper divisors (1).

82505979131 is an equidigital number, since it uses as much as digits as its factorization.

82505979131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 680400, while the sum is 50.

The spelling of 82505979131 in words is "eighty-two billion, five hundred five million, nine hundred seventy-nine thousand, one hundred thirty-one".