85109481 has 16 divisors (see below), whose sum is σ = 129165120. Its totient is φ = 55355040.

The previous prime is 85109471. The next prime is 85109483. The reversal of 85109481 is 18490158.

It is not a de Polignac number, because 85109481 - 2¹¹ = 85107433 is a prime.

It is a super-2 number, since 2×85109481² = 14487247512178722, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (85109483) 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 in 15 ways as a sum of consecutive naturals, for example, 37335 + ... + 39548.

It is an arithmetic number, because the mean of its divisors is an integer number (8072820).

Almost surely, 2^85109481 is an apocalyptic number.

It is an amenable number.

85109481 is a deficient number, since it is larger than the sum of its proper divisors (44055639).

85109481 is a wasteful number, since it uses less digits than its factorization.

85109481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76933 (or 76927 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 85109481 is about 9225.4799875128. The cubic root of 85109481 is about 439.8716585050.

The spelling of 85109481 in words is "eighty-five million, one hundred nine thousand, four hundred eighty-one".