82136322731 has 2 divisors, whose sum is σ = 82136322732. Its totient is φ = 82136322730.

The previous prime is 82136322703. The next prime is 82136322791. The reversal of 82136322731 is 13722363128.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82136322731 - 2¹⁴ = 82136306347 is a prime.

It is a super-2 number, since 2×82136322731² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (82136322791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41068161365 + 41068161366.

It is an arithmetic number, because the mean of its divisors is an integer number (41068161366).

Almost surely, 2^82136322731 is an apocalyptic number.

82136322731 is a deficient number, since it is larger than the sum of its proper divisors (1).

82136322731 is an equidigital number, since it uses as much as digits as its factorization.

82136322731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 38.

Adding to 82136322731 its reverse (13722363128), we get a palindrome (95858685859).

The spelling of 82136322731 in words is "eighty-two billion, one hundred thirty-six million, three hundred twenty-two thousand, seven hundred thirty-one".