82259561 has 2 divisors, whose sum is σ = 82259562. Its totient is φ = 82259560.

The previous prime is 82259533. The next prime is 82259563. The reversal of 82259561 is 16595228.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60543961 + 21715600 = 7781^2 + 4660^2 .

It is a cyclic number.

It is not a de Polignac number, because 82259561 - 2⁶ = 82259497 is a prime.

It is a Sophie Germain prime.

Together with 82259563, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (82259563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41129780 + 41129781.

It is an arithmetic number, because the mean of its divisors is an integer number (41129781).

Almost surely, 2^82259561 is an apocalyptic number.

It is an amenable number.

82259561 is a deficient number, since it is larger than the sum of its proper divisors (1).

82259561 is an equidigital number, since it uses as much as digits as its factorization.

82259561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43200, while the sum is 38.

The square root of 82259561 is about 9069.7056732840. The cubic root of 82259561 is about 434.9060633027.

The spelling of 82259561 in words is "eighty-two million, two hundred fifty-nine thousand, five hundred sixty-one".