82535581 has 2 divisors, whose sum is σ = 82535582. Its totient is φ = 82535580.

The previous prime is 82535573. The next prime is 82535591. The reversal of 82535581 is 18553528.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75951225 + 6584356 = 8715^2 + 2566^2 .

It is a cyclic number.

It is not a de Polignac number, because 82535581 - 2³ = 82535573 is a prime.

It is a super-2 number, since 2×82535581² = 13624244262015122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 82535581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82535521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41267790 + 41267791.

It is an arithmetic number, because the mean of its divisors is an integer number (41267791).

Almost surely, 2^82535581 is an apocalyptic number.

It is an amenable number.

82535581 is a deficient number, since it is larger than the sum of its proper divisors (1).

82535581 is an equidigital number, since it uses as much as digits as its factorization.

82535581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48000, while the sum is 37.

The square root of 82535581 is about 9084.9095207382. The cubic root of 82535581 is about 435.3919592196.

The spelling of 82535581 in words is "eighty-two million, five hundred thirty-five thousand, five hundred eighty-one".