85527819 has 20 divisors (see below), whose sum is σ = 137593456. Its totient is φ = 52631856.

The previous prime is 85527809. The next prime is 85527821. The reversal of 85527819 is 91872558.

It is a happy number.

It is not a de Polignac number, because 85527819 - 2¹¹ = 85525771 is a prime.

It is a super-2 number, since 2×85527819² = 14630015645793522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85527809) 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 in 19 ways as a sum of consecutive naturals, for example, 39559 + ... + 41664.

Almost surely, 2^85527819 is an apocalyptic number.

85527819 is a deficient number, since it is larger than the sum of its proper divisors (52065637).

85527819 is a wasteful number, since it uses less digits than its factorization.

85527819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81248 (or 81239 counting only the distinct ones).

The product of its digits is 201600, while the sum is 45.

The square root of 85527819 is about 9248.1251613503. The cubic root of 85527819 is about 440.5911802019.

The spelling of 85527819 in words is "eighty-five million, five hundred twenty-seven thousand, eight hundred nineteen".