82303021 has 2 divisors, whose sum is σ = 82303022. Its totient is φ = 82303020.

The previous prime is 82302991. The next prime is 82303043. The reversal of 82303021 is 12030328.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42120100 + 40182921 = 6490^2 + 6339^2 .

It is a cyclic number.

It is not a de Polignac number, because 82303021 - 2¹¹ = 82300973 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 82303021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82303051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41151510 + 41151511.

It is an arithmetic number, because the mean of its divisors is an integer number (41151511).

Almost surely, 2^82303021 is an apocalyptic number.

It is an amenable number.

82303021 is a deficient number, since it is larger than the sum of its proper divisors (1).

82303021 is an equidigital number, since it uses as much as digits as its factorization.

82303021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 82303021 is about 9072.1012450259. The cubic root of 82303021 is about 434.9826407835.

Adding to 82303021 its reverse (12030328), we get a palindrome (94333349).

The spelling of 82303021 in words is "eighty-two million, three hundred three thousand, twenty-one".