82158478331 has 2 divisors, whose sum is σ = 82158478332. Its totient is φ = 82158478330.

The previous prime is 82158478307. The next prime is 82158478351. The reversal of 82158478331 is 13387485128.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 82158478331 - 2¹⁴ = 82158461947 is a prime.

It is a super-2 number, since 2×82158478331² (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 82158478331.

It is not a weakly prime, because it can be changed into another prime (82158478351) 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, 41079239165 + 41079239166.

It is an arithmetic number, because the mean of its divisors is an integer number (41079239166).

Almost surely, 2^82158478331 is an apocalyptic number.

82158478331 is a deficient number, since it is larger than the sum of its proper divisors (1).

82158478331 is an equidigital number, since it uses as much as digits as its factorization.

82158478331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1290240, while the sum is 50.

The spelling of 82158478331 in words is "eighty-two billion, one hundred fifty-eight million, four hundred seventy-eight thousand, three hundred thirty-one".