85735581 has 16 divisors (see below), whose sum is σ = 120699840. Its totient is φ = 53982720.

The previous prime is 85735579. The next prime is 85735589. The reversal of 85735581 is 18553758.

It is a happy number.

It is not a de Polignac number, because 85735581 - 2¹ = 85735579 is a prime.

It is a super-2 number, since 2×85735581² = 14701179698815122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85735589) 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, 17991 + ... + 22251.

It is an arithmetic number, because the mean of its divisors is an integer number (7543740).

Almost surely, 2^85735581 is an apocalyptic number.

It is an amenable number.

85735581 is a deficient number, since it is larger than the sum of its proper divisors (34964259).

85735581 is a wasteful number, since it uses less digits than its factorization.

85735581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4636.

The product of its digits is 168000, while the sum is 42.

The square root of 85735581 is about 9259.3510031751. The cubic root of 85735581 is about 440.9476493408.

The spelling of 85735581 in words is "eighty-five million, seven hundred thirty-five thousand, five hundred eighty-one".