82581215263 has 2 divisors, whose sum is σ = 82581215264. Its totient is φ = 82581215262.

The previous prime is 82581215257. The next prime is 82581215293. The reversal of 82581215263 is 36251218528.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82581215263 - 2¹⁷ = 82581084191 is a prime.

It is a super-2 number, since 2×82581215263² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82581215293) 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, 41290607631 + 41290607632.

It is an arithmetic number, because the mean of its divisors is an integer number (41290607632).

Almost surely, 2^82581215263 is an apocalyptic number.

82581215263 is a deficient number, since it is larger than the sum of its proper divisors (1).

82581215263 is an equidigital number, since it uses as much as digits as its factorization.

82581215263 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 230400, while the sum is 43.

The spelling of 82581215263 in words is "eighty-two billion, five hundred eighty-one million, two hundred fifteen thousand, two hundred sixty-three".