82243591 has 2 divisors, whose sum is σ = 82243592. Its totient is φ = 82243590.

The previous prime is 82243583. The next prime is 82243597. The reversal of 82243591 is 19534228.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 82243591 - 2³ = 82243583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82243597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41121795 + 41121796.

It is an arithmetic number, because the mean of its divisors is an integer number (41121796).

Almost surely, 2^82243591 is an apocalyptic number.

82243591 is a deficient number, since it is larger than the sum of its proper divisors (1).

82243591 is an equidigital number, since it uses as much as digits as its factorization.

82243591 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 82243591 is about 9068.8252271173. The cubic root of 82243591 is about 434.8779170331.

The spelling of 82243591 in words is "eighty-two million, two hundred forty-three thousand, five hundred ninety-one".