82823281 has 2 divisors, whose sum is σ = 82823282. Its totient is φ = 82823280.

The previous prime is 82823263. The next prime is 82823297. The reversal of 82823281 is 18232828.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44890000 + 37933281 = 6700^2 + 6159^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82823281 is a prime.

It is a super-2 number, since 2×82823281² = 13719391751209922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (82823581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41411640 + 41411641.

It is an arithmetic number, because the mean of its divisors is an integer number (41411641).

Almost surely, 2^82823281 is an apocalyptic number.

It is an amenable number.

82823281 is a deficient number, since it is larger than the sum of its proper divisors (1).

82823281 is an equidigital number, since it uses as much as digits as its factorization.

82823281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12288, while the sum is 34.

The square root of 82823281 is about 9100.7296960189. The cubic root of 82823281 is about 435.8972645325.

The spelling of 82823281 in words is "eighty-two million, eight hundred twenty-three thousand, two hundred eighty-one".