82256891 has 2 divisors, whose sum is σ = 82256892. Its totient is φ = 82256890.

The previous prime is 82256879. The next prime is 82256899. The reversal of 82256891 is 19865228.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82256891 is a prime.

It is a super-2 number, since 2×82256891² = 13532392233971762, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (82256899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41128445 + 41128446.

It is an arithmetic number, because the mean of its divisors is an integer number (41128446).

Almost surely, 2^82256891 is an apocalyptic number.

82256891 is a deficient number, since it is larger than the sum of its proper divisors (1).

82256891 is an equidigital number, since it uses as much as digits as its factorization.

82256891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 41.

The square root of 82256891 is about 9069.5584787794. The cubic root of 82256891 is about 434.9013578244.

The spelling of 82256891 in words is "eighty-two million, two hundred fifty-six thousand, eight hundred ninety-one".