82322281 has 2 divisors, whose sum is σ = 82322282. Its totient is φ = 82322280.

The previous prime is 82322249. The next prime is 82322309. The reversal of 82322281 is 18222328.

It is an a-pointer prime, because the next prime (82322309) can be obtained adding 82322281 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56475225 + 25847056 = 7515^2 + 5084^2 .

It is a cyclic number.

It is not a de Polignac number, because 82322281 - 2⁵ = 82322249 is a prime.

It is a super-2 number, since 2×82322281² = 13553915898085922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (82322881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41161140 + 41161141.

It is an arithmetic number, because the mean of its divisors is an integer number (41161141).

Almost surely, 2^82322281 is an apocalyptic number.

It is an amenable number.

82322281 is a deficient number, since it is larger than the sum of its proper divisors (1).

82322281 is an equidigital number, since it uses as much as digits as its factorization.

82322281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3072, while the sum is 28.

The square root of 82322281 is about 9073.1626790221. The cubic root of 82322281 is about 435.0165687088.

It can be divided in two parts, 823 and 22281, that added together give a square (23104 = 152²).

The spelling of 82322281 in words is "eighty-two million, three hundred twenty-two thousand, two hundred eighty-one".