82115215801 has 2 divisors, whose sum is σ = 82115215802. Its totient is φ = 82115215800.

The previous prime is 82115215789. The next prime is 82115215817. The reversal of 82115215801 is 10851251128.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82068498576 + 46717225 = 286476^2 + 6835^2 .

It is a cyclic number.

It is not a de Polignac number, because 82115215801 - 2¹⁹ = 82114691513 is a prime.

It is not a weakly prime, because it can be changed into another prime (82115212801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41057607900 + 41057607901.

It is an arithmetic number, because the mean of its divisors is an integer number (41057607901).

Almost surely, 2^82115215801 is an apocalyptic number.

It is an amenable number.

82115215801 is a deficient number, since it is larger than the sum of its proper divisors (1).

82115215801 is an equidigital number, since it uses as much as digits as its factorization.

82115215801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6400, while the sum is 34.

Adding to 82115215801 its reverse (10851251128), we get a palindrome (92966466929).

The spelling of 82115215801 in words is "eighty-two billion, one hundred fifteen million, two hundred fifteen thousand, eight hundred one".