82215943 has 2 divisors, whose sum is σ = 82215944. Its totient is φ = 82215942.

The previous prime is 82215857. The next prime is 82215949. The reversal of 82215943 is 34951228.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 82215943 - 2⁹ = 82215431 is a prime.

It is a super-2 number, since 2×82215943² = 13518922566758498, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 82215899 and 82215908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82215949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41107971 + 41107972.

It is an arithmetic number, because the mean of its divisors is an integer number (41107972).

Almost surely, 2^82215943 is an apocalyptic number.

82215943 is a deficient number, since it is larger than the sum of its proper divisors (1).

82215943 is an equidigital number, since it uses as much as digits as its factorization.

82215943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 34.

The square root of 82215943 is about 9067.3007560133. The cubic root of 82215943 is about 434.8291802984.

The spelling of 82215943 in words is "eighty-two million, two hundred fifteen thousand, nine hundred forty-three".