85305523 has 2 divisors, whose sum is σ = 85305524. Its totient is φ = 85305522.

The previous prime is 85305503. The next prime is 85305533. The reversal of 85305523 is 32550358.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85305523 is a prime.

It is not a weakly prime, because it can be changed into another prime (85305503) 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, 42652761 + 42652762.

It is an arithmetic number, because the mean of its divisors is an integer number (42652762).

Almost surely, 2^85305523 is an apocalyptic number.

85305523 is a deficient number, since it is larger than the sum of its proper divisors (1).

85305523 is an equidigital number, since it uses as much as digits as its factorization.

85305523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 85305523 is about 9236.0989059234. The cubic root of 85305523 is about 440.2091343970.

The spelling of 85305523 in words is "eighty-five million, three hundred five thousand, five hundred twenty-three".