85005541 has 2 divisors, whose sum is σ = 85005542. Its totient is φ = 85005540.

The previous prime is 85005533. The next prime is 85005551. The reversal of 85005541 is 14550058.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82283041 + 2722500 = 9071^2 + 1650^2 .

It is a cyclic number.

It is not a de Polignac number, because 85005541 - 2³ = 85005533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85005511) 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, 42502770 + 42502771.

It is an arithmetic number, because the mean of its divisors is an integer number (42502771).

Almost surely, 2^85005541 is an apocalyptic number.

It is an amenable number.

85005541 is a deficient number, since it is larger than the sum of its proper divisors (1).

85005541 is an equidigital number, since it uses as much as digits as its factorization.

85005541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4000, while the sum is 28.

The square root of 85005541 is about 9219.8449553124. The cubic root of 85005541 is about 439.6925210605.

Adding to 85005541 its reverse (14550058), we get a palindrome (99555599).

It can be divided in two parts, 8500 and 5541, that added together give a palindrome (14041).

The spelling of 85005541 in words is "eighty-five million, five thousand, five hundred forty-one".